Gaining a deep understanding of the layout of Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra is crucial for maximizing their value and effectiveness in everyday use. By familiarizing yourself with the design of Galaxy S25, S25+, and S25 Ultra, you can fully harness their capabilities and unlock the full potential of the flagship phone of 2025.
This Galaxy S25 How-to guide provides a comprehensive overview of the layout of Galaxy S25, S25+, and S25 Ultra. It details the functions of each component in the layout of Galaxy S25, S25+, and S25 Ultra, enabling you to gain a thorough understanding of these 3 models. Additionally, this guide offers you recommendations for the effective use and maintenance of each part depicted in the layout of Galaxy S25, S25+, and S25 Ultra, ensuring optimal performance and longevity of the Galaxy S25 series.
The Galaxy S25 and Galaxy S25+ vary in size, but their layouts are identical. In contrast, the Galaxy S25 Ultra features a different layout on the bottom and rear due to the inclusion of the S Pen and additional camera sensors, as explained in Galaxy S25 vs. Galaxy S25+ vs. Galaxy S25 Ultra. However, the front view of the Galaxy S25 Ultra is nearly identical to that of the Galaxy S25 and Galaxy S25+. The software, including the One UI 8 update (Android 16), is identical on all these models.
Front view of the layout of Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra
The Galaxy S25 Ultra has made a noteworthy departure from the sharp corners that were characteristic of the Galaxy Note series, opting instead for a rounded design this year. This alteration in design results in a nearly identical front view of the layout of GalaxyS 25, S25+, and S25 Ultra, as evidenced by the image below.
In this section, we will conduct a thorough examination of the various components of the front view layout of Galaxy S25, S25+, and S25 Ultra. Each element will be assigned a corresponding number that will align with the identification in the accompanying illustration for ease of reference.
1. Screen
The Galaxy S25, S25+, and S25 Ultra smartphones are equipped with stunning high-quality (namely Dynamic AMOLED 2X) screens, often referred to as touchscreens or displays. These vibrant displays are not just windows to information; they play a crucial role in enhancing the overall functionality of your device.
The screen functions as the principal interface for information dissemination, enabling users to access a diverse array of textual content. Additionally, it enhances the experience by delivering high-quality graphics and multimedia presentations, including videos, thereby offering a comprehensive and engaging visual experience.
Effective interaction with Galaxy S25 necessitates the presence of a screen to facilitate engagement with applications. Relying solely on the two buttons (volume key and Side key) is insufficient for control and interaction with the phone.
To effectively engage with the Galaxy S25, S25+, or S25 Ultra, one must master a series of touchscreen gestures, regardless of any preference for traditional navigation buttons. Every application, along with the Galaxy S25 Home screen, Apps screen, and Lock screen, demands some touchscreen gestures to ensure the functionality.
To save battery, the screen turns off automatically after a specific duration without activities. Lock screen timeout, by default, is shorter than the screen timeout settings.
2. Fingerprint sensor
Samsung has implemented an in-display ultrasonic fingerprint recognition sensor in its Galaxy S10 and subsequent models. While this sensor exhibits superior performance compared to most optical under-display fingerprint readers, such as those found in the Pixel series and Xiaomi phones, it remains less effective than the traditional capacitive fingerprint reader commonly situated on the rear panel of the device. Some Android device manufacturers, e.g., Motorola and Amazon, like to embed the capacitive fingerprint sensor in the power button. The circular-shaped capacitive fingerprint reader is widely regarded as a more reliable and efficient alternative to the rectangular-shaped in-display sensor.
The fingerprint sensor on the Galaxy S25 is designed to facilitate the unlocking of the phone. When the sensor is required, a fingerprint location indicator will automatically display on the lock screen. You can simply place your finger on the designated area to unlock the phone. Furthermore, certain applications,e.g., some bank apps, may also enable users to utilize the fingerprint sensor for account login purposes.
It is important to highlight that the fingerprint sensor of the Galaxy S25 may encounter compatibility challenges with specific types of screen protectors. To optimize the functionality of the device's fingerprint reader, it is advisable to check the coming Galaxy S25 screen protector guide (coming soon). This resource will offer comprehensive information on selecting a compatible screen protector for the Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra models.
To use the fingerprint reader sensor to unlock Galaxy S25, you must set up the screen lock type to the pattern, PIN, or password. The fingerprint recognition sensor can only be used as a secondary method.
3. Proximity/light sensor
The Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra are equipped with a proximity and light sensor that is seamlessly integrated behind the display glass, eliminating the need for a physical cutout, which distinguishes it from the front camera. In fact, it is almost impossible for you to see the sensor with the naked eye.
This sensor functions as a combination of a proximity sensor and an ambient light sensor. The proximity sensor is engineered to detect nearby objects, which proves particularly useful during phone calls. When the device is positioned close to the user's ear, the sensor activates the screen to turn off automatically, thereby preventing unintended inputs and optimizing battery consumption during voice calls.
Conversely, the light sensor monitors ambient lighting conditions in the vicinity of the device. This function enables Galaxy S25 to adjust screen brightness and color tone dynamically to ensure optimal visibility under various lighting scenarios. You still retain the capability to manually adjust screen brightness settings, including the option to activate the Extra Dim feature, which further reduces brightness levels. Additionally, certain applications may access data from the light sensor to provide you with a more personalized and adaptive experience.
4. Front camera
The Galaxy S25 series includes three distinct models, all equipped with an identical front-facing camera that features a sensor with a resolution of 12 megapixels. This consistent specification across the range ensures uniform quality in the selfie images captured by the Galaxy S25, regardless of the selected model. In the front view of the layout of Galaxy S25, S25+, and S25 Ultra, you can clearly see the cutout.
Modern smartphones that utilize notched displays typically incorporate the front-facing camera cutout within the status bar. However, this design may be perceived as distracting by some users, prompting them to seek alternatives for concealment. One such method involves the addition of a black bar at the upper portion of the screen, which effectively obscures the notch; however, this solution reduces the usable screen area available for content display.
Please note that most Galaxy S25 screen protectors do not have a cutout for the front camera. This may affect the image quality slightly if the material of the screen protector is not right.
Now let's look at the top of Galaxy S25, S25+, and S25 Ultra.
5. Top speaker (earpiece)`
The top speaker, also referred to as the earpiece, positioned on the upper front of the Galaxy S25's layout, is engineered to fulfill two distinct functions.:
- Firstly, it functions as an earpiece while you are engaged in a phone call, delivering crisp and clear sound quality for seamless communication.
- Secondly, it functions as one component of a stereo speaker pair when audio is played, operating in conjunction with the lower speaker (#19) to create a rich and immersive auditory experience.
Most Galaxy S25 flip covers have a long and narrow cutout for the top speaker. However, back covers/cases do not need a cutout for this speaker because the opening of this speaker is located between the frame and the screen.
6. Microphone (top)
The Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra models are equipped with three microphones, strategically positioned to serve distinct functions.
One microphone is situated at the top, another at the bottom (#20), and a third on the back (#15). The top microphone is typically referred to as the secondary microphone, while the bottom microphone is designated as the primary. The rear microphone is commonly identified as the zoom-in microphone, enhancing audio capture capabilities for sthe camera.
When any of the microphones is accessed, the microphone access icon will show up.
7. Air vent hole
The air vent hole at the top of Galaxy S25, S25+, and S25 Ultra serves a critical function by helping to balance the air pressure around the top microphone (#6) with the ambient environment. This adjustment is critical as it reduces the potential for unwanted noise resulting from pressure fluctuations. By facilitating the unobstructed flow of ambient air, the vent fosters a more stable acoustic environment, thereby improving the microphone’s capacity to capture sound with clarity and precision. This design element is essential for ensuring optimal performance.
You should not cover the air vent hole when applying a case or cover for Galaxy S25, S25+, or S25 Ultra. Otherwise, unwanted noises may occur during calls or media playback.
8. Volume key
The primary purpose of the volume key on the Galaxy S25 is to regulate the audio output. This key comprises two distinct buttons: one for increasing the volume and one for decreasing it. These buttons allow the user to adjust the sound level to their preferred setting.
Just like other Android devices, the Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra allow you to utilize the volume keys for various functions. For instance, you may utilize the volume key as the shutter button when capturing photographs. In the event that the device becomes unresponsive, it may also be necessary to employ the volume key to perform a forceful restart of the Galaxy S25.
Since the Galaxy S20, Samsung has relocated the volume key to the right side of the phone.
By default, pressing the volume key on the Galaxy S25 will display the volume slider when media is not being played. You can access the sliders for media, system sounds, ringtones, and notifications through the Settings menu.
9. Side key
The Galaxy S25, S25+, and S25 Ultra smartphones do not feature a dedicated power button. Rather, beginning with the Galaxy S20 (for S series), Samsung has consolidated the Power button and the Bixby button into a single button known as the Side key.
The functions for powering the device on and off can be easily accessed via this Side key. To initiate the setup process or activate the device, you must press and hold the Side key for several seconds. Additionally, the Side key serves dual purposes by allowing users to launch the new AI assistant (Gemini) or access the Power-off menu.
Certain applications may also leverage the Side key for specific functionalities. For instance, it is possible to launch the camera app on the Galaxy S25 by double-pressing the Side key even without the need to unlock the device.
The most frequently used function of the Side key is to control the display. When the screen is active, pressing the Side key will turn it off. Conversely, if the screen is inactive, pressing the Side key will activate the display and awaken the device.
Please refer to this guide (coming soon) on how to use and customize the Side key on Galaxy S25, S25+, and S25 Ultra.
Rear view of the layout of Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra
Now, let's look at the back of the three phones.
The rear layout of Galaxy S25 and Galaxy S25+ is identical. In contrast, the rear design of the Galaxy S25 Ultra differs from that of the Galaxy S25 and S25+, mainly in the camera bump area.
The following two images provide a detailed representation of the rear layout for the Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra. The first image illustrates the configurations for the Galaxy S25 and S25+, while the second image showcases the slightly different layout of Galaxy S25 Ultra.
10. Wireless charging coil
The wireless charging coils for the Galaxy S25, S25+, and S25 Ultra are situated near the central region of the back panel of each device.
All three of these phones utilize wireless charging coils to facilitate two primary functions:
- Wireless charging. To charge the Galaxy S25 wirelessly without resorting to the USB-C interface, ensure proper alignment between the wireless charging pad and the device's charging coil. You may check this comprehensive guide on selecting and utilizing a compatible wireless charger for Galaxy S25, S24, S23, S22, and a range of other Galaxy models. Be aware that the Battery Protection feature on the Galaxy S25 may influence the efficacy and behavior of wireless charging.
- Wireless PoweShare (reverse wireless charging). The Galaxy S25 is equipped with the capability to function as a reverse wireless charger, allowing it to wirelessly charge compatible devices, such as Galaxy Buds, that utilize Qi wireless charging technology.
Some bulky cases designed for the Galaxy S25 may adversely affect the device's wireless charging capabilities. Nevertheless, the official cases offered for the Galaxy S25, such as the Galaxy S25 Flipsuit case, do not interfere with the functionality of wireless charging.
11. NFC antenna
The NFC antenna has been strategically positioned above the wireless charging coil and opposite the camera components in all three Galaxy S25 models. This placement is consistent with that of the Galaxy S24. However, it represents a departure from the configurations observed in earlier generations, such as the Galaxy S23.
On the Galaxy S25, NFC is commonly utilized for services such as Samsung Pay or Google Pay. Additionally, certain apps can use NFC to facilitate communication between the phone and an NFC reader. It is important to be aware of the approximate location of the NFC antenna when engaging in payment transactions or connecting with other NFC readers.
Some official Galaxy S25 accessories, for example, the Galaxy S25 Flipsuit Case, require an NFC connection to enable the interactive card.
12. Main antenna
The main antenna on the Galaxy S25 smartphone is positioned near the bottom of the device. This component plays a key role in enabling wireless communication, such as 5G, between the phone and nearby cellular towers. It is essential for establishing a reliable connection with the network, facilitating voice calls and mobile data services.
Metallic objects are known to interfere with the performance of antennas. If intermittent connectivity issues occur, placing the mobile device on a flat surface can help determine if the antenna is obstructed.
13. GPS antenna
The Galaxy S25 has its Global Positioning System (GPS) antenna situated near the top right corner of the phone when viewed from the back, directly opposite the camera lens.
Smartphones, such as the Galaxy S25, employ GPS antennas to accurately determine their location. These antennas capture signals from a network of satellites orbiting the Earth, which are then used to calculate the device's coordinates. This functionality is crucial for a variety of location-based services and applications, including navigation, mapping, and tracking.
With the GPS antenna, smartphones can offer real-time directions, monitor fitness activities, identify nearby points of interest, and assist emergency services by quickly determining a user's location in critical situations. The significance of GPS antennas in the Galaxy S25 is evident, as they enable a wide range of services that rely on precise location data.
14. Rear camera
The Galaxy S25 and Galaxy S25+ feature similar rear-facing camera systems with the same configuration, which includes a 50-megapixel wide-angle camera, a 12-megapixel ultra-wide camera, and a 10-megapixel telephoto camera that supports 3x optical zoom.
The Galaxy S25 Ultra features a more advanced rear camera system with four distinct camera lenses. This includes:
- a 200-megapixel wide-angle camera,
- a 12-megapixel ultra-wide camera,
- a 10-megapixel telephoto camera with 3x optical zoom, and
- a 50-megapixel telephoto camera offering 5x optical zoom.
While the 50MP telephoto camera has a lower optical zoom capacity compared to the 10x optical zoom camera in the Galaxy S23 Ultra, the photo quality at 10x zoom is noted to be enhanced with the new camera system on the Galaxy S25. This improvement is attributed to the upgraded ProVisual Engine and new Galaxy AI features, along with the greater pixel count of the new telephoto lens. Samsung called the 10x zoom on the Galaxy S25 Ultra “optical quality zoom”, which is essentially a hybrid zoom. You can try various camera modes with the rear camera in the Camera app.
15. Zoom-in microphone
The zoom-in microphone of the Galaxy S25 seriees is positioned between the raised section (bump) of the 12MP ultra-wide camera and the rear chassis, optimizing audio capture during imaging and videography.
You can use a zoom-in microphone to amplify (zoom in) the sound of the subject (e.g., musical instrument) and minimize the background noise when you record a video or audio.
The Galaxy Note 10 introduced a zoom-in microphone feature, which was subsequently incorporated into the Galaxy S20, Galaxy Note 20, and Galaxy S21 series. However, this feature was removed from the Galaxy S22, S22+, and S22 Ultra models. Instead, the microphones located at the top and bottom of these devices were used to deliver zoom-in audio. The zoom-in microphone has been reintroduced in the Galaxy S23, S24, and Galaxy S25 series.
16. LED Flash
The flash feature on the Galaxy S25 can be utilized in the following two ways:
- A torch. It is controlled with a quick-setting button.
- A lighting source when taking photos in the darkness. When photographing in low-light environments, securing an adequate light source is vital. This can be effectively managed using the flash function available in the camera app. However, it is important to recognize that the use of flash does not always improve image quality, as it can often lead to overexposure or harsh lighting effects, depending on the scene and subject.
When employing the flash functionality of your Galaxy S25 as a continuous light source, you may observe a modest rise in the device’s temperature. This phenomenon is a typical response due to the substantial power draw associated with prolonged use, which can lead to increased thermal output as the battery discharges at a higher rate.
17. Laser AF sensor (Galaxy S25 Ultra only)
The Galaxy S25 Ultra continues the tradition established by its predecessors by integrating a laser autofocus (AF) sensor, a feature absent in the Galaxy S25 and S25+.
This laser AF sensor may significantly improve the autofocus capabilities of the main camera by employing a laser beam to precisely gauge the distance between the camera and the subject. This method enhances both speed and accuracy in focusing, particularly in low-light environments where conventional contrast-detection and phase-detection systems may falter. The implementation of this sensor thus marks a critical upgrade in optimizing camera performance under challenging lighting conditions.
As previously noted, the Galaxy S25 and Galaxy S25+ models do not feature the Laser AF sensor, which is an exclusive offering of the Galaxy S25 Ultra variant.
Bottom view of the layout of Galaxy S25, Galaxy S25+, Galaxy S25 Ultra
Now let's check the bottom of Galaxy S25, S25+, and S25 Ultra.
The layout of the Galaxy S25 and Galaxy S25+ smartphones features an identical bottom view. In contrast, the bottom view of the Galaxy S25 Ultra is distinct due to the inclusion of the S Pen and its corresponding slot. The two figures below illustrate the bottom view of the layouts for the Galaxy S25 (and Galaxy S25+) and Galaxy S25 Ultra, respectively.
18. USB-C port (multipurpose jack)
The Galaxy S25, S25+, and S25 Ultra feature a sole external interface: a USB-C port positioned at the bottom of these 3 phones. This multipurpose jack supports a range of wired peripherals, such as chargers, external displays, USB thumb drives, and USB-C audio devices.
It is important to emphasize that the USB-C port functions as a shared resource among connected peripherals, which presents a challenge for users who wish to connect multiple devices concurrently.
In instances where it is necessary to connect multiple USB devices or to charge the Galaxy S25 while simultaneously connecting another USB accessory, it is advisable to consider the acquisition of a USB-C hub.
19. Speaker (bottom)
In the Galaxy S25, the bottom speaker operates in conjunction with the top speaker to deliver a more immersive audio experience.
The layout distinction observed in the bottom view of the Galaxy S25 and S25+ compared to the Galaxy S25 Ultra is noteworthy. Specifically, the placement of the bottom speaker on the Galaxy S25 Ultra is to the left of the USB-C port when viewed from the bottom. In contrast, both the Galaxy S25 and S25+ position the speaker to the right of the USB-C port.
20. Microphone (bottom)
The Galaxy S25 features a tri-microphone array consisting of three units positioned at the top (#6), bottom, and rear (#15) of the device. This bottom microphone usually serves as the primary audio input and is optimized for general use.
Some applications may leverage the functionality of two microphones located at both the top and bottom of Galaxy S25 simultaneously. For instance, during a phone conversation, the microphone positioned at the top plays a crucial role in noise cancellation, filtering out ambient sounds to enhance call clarity, while the microphone at the bottom is dedicated to capturing your voice, ensuring that your words are transmitted clearly to the person on the other end.
The voice recorder app is another example using two microphones concurrently. The voice recorder app offers an “interview mode,” which utilizes both microphones to optimize audio recording quality; this allows for clearer differentiation between voices, perfect for capturing conversations with multiple speakers in a professional or journalistic setting.
21. SIM card tray
The SIM card tray for the Galaxy S25, Galaxy S25+, and Galaxy S25 Ultra is located at the bottom of each device. The positioning of the tray varies among the three models. In the Galaxy S25 Ultra, the SIM card tray is positioned to the right of the USB-C port, while in the Galaxy S25 and S25+, it is located to the left of the USB-C port.
If your Galaxy S25 is the dual-SIM version (dual standby only), The SIM card tray has two slots on both sides (up and down), and you can use two SIM cards concurrently on your phone.
Galaxy S25 also supports eSIM, so you can choose to use a physical SIM card and eSIM. None of the Galaxy S25 models supports two eSIM profiles concurrently.
22. SIM card tray hole
The SIM card tray hole is a component of the tray itself and serves a singular purpose: to facilitate the ejection of the SIM card tray.
To eject the tray, insert the provided ejection pin into the opening and apply an adequate amount of force. This should successfully release the tray, allowing for the removal or replacement of the SIM card.
It’s important to remember that when you’re ejecting the SIM card tray using the ejection pin included with your Galaxy S25, you need to make sure you're using the right hole. If you accidentally insert the pin into the microphone hole at the bottom, you could risk damaging the microphone. For the Galaxy S25 series, Samsung also improved the design of the SIM card tray by locating the SIM card hold far from the bottom microphone.
23. S Pen (Galaxy S25 Ultra only)
The exclusive S Pen slot and the accompanying S Pen are featured only in the Galaxy S25 Ultra. The Galaxy S25 and Galaxy S25+ do not support the use of the S Pen.
It is important to note that the S Pen, which comes with the Galaxy S25 Ultra, does not support Bluetooth. Samsung removed the Bluetooth capabilities for the S Pen. This means you cannot use S Pen as a remote control (e.g., camera shutter, wireless presenter, media play controller).
Do you have any questions about the layout of Galaxy S25, S25+, and S25 Ultra?
Please share any questions or comments regarding the layout of Galaxy S25, S25+, and S25 Ultra, as well as the functions of each component in the comment box below.
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You may check other sections of Galaxy S25 Guides: Everything about Galaxy S25:
- The Galaxy S25 News and Updates section provides the latest news, updates, and analyses for Samsung Galaxy S25, S25+, S25 Ultra, and S25 Slim. You can find a broad range of topics, including Galaxy S25 specifications, design features, One UI updates, and market dynamics so that Galaxy S25 owners or potential owners can remain well-informed about the latest updates and trends of Galaxy S25.
- The Galaxy S25 New Features Guides deliver an in-depth analysis of the advancements and new capabilities of the Galaxy S25, S25+, and S25 Ultra models compared to their predecessors in the Galaxy S series, as well as other leading Android flagship devices. These guides are an invaluable resource for answering technical questions related to Galaxy S25, while also offering detailed insights and comparative evaluations to facilitate informed decision-making in the purchasing process.
- The Galaxy AI Guides section comprises a thorough collection of resources and tools aimed at assisting users in effectively navigating and using the features of Galaxy AI on Galaxy S25, S25+, and SD25 Ultra. This section includes detailed explanations, comprehensive step-by-step instructions, and expert recommendations. Each guide is specifically designed to address particular functionalities, ensuring that individuals, regardless of their experience level, can enhance their knowledge and efficiency in utilizing Galaxy AI.
- The Galaxy S25 How-to Guides provide an extensive array of resources that deliver comprehensive instructions on using and personalizing the Galaxy S25, S25+, and S25 Ultra. These thorough guides encompass all facets of operating the Galaxy S25 series, including hardware and software features, functionalities of the Android operating system and One UI, as well as procedures for migration and data sharing. By consulting the Galaxy S25 How-to Guides, you can gain an in-depth understanding of both the capabilities and customization options available for your Galaxy S25, S25+, and S25 Ultra.
- The Galaxy S25 Camera Guides section offers a comprehensive compilation of instructional resources designed to assist Galaxy S25 owners in effectively using the Galaxy S25 camera for capturing exceptional photographs and recording high-quality videos. Additionally, it includes guidance on the application of the photo (and video) editor available on the Galaxy S25, S25+, and S25 Ultra.
- The Galaxy S25 Accessories Guides section offers detailed guides on the usage of various accessories specifically designed to enhance functionality and protect the Galaxy S25, S25+, and S25 Ultra. These guides cover a wide range of topics, including protective accessories and feature augmentation accessories. Furthermore, this section provides comprehensive reviews of specific accessories for Galaxy S25, S25+, and S25 Ultra.
- The Galaxy S25 User Manual section comprises the official user manual for the Samsung Galaxy S25, S25+, and S25 Ultra, available in PDF format. These user manuals have been released by Samsung across various regions and are organized according to the respective languages. The content of this material is comprehensive and structured, facilitating easier access to the necessary information for Galaxy S25 owners.
- The Galaxy S25 Reviews section is dedicated to reviews of the Galaxy S25, S25+, and S25 Ultra and their accessories. These reviews are all based on our own usage as consumers. Depending on the objects being reviewed, Galaxy S25 reviews include detailed technology and design evaluations, everyday usage and performance, and comparison to other similar products.
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On the sides of my S25 Ultra there are 2 contacts on the phone about 1 cm from the bottom. What are these for? My Ultra has them on both sides, but my brother’s S25 Ultra has them only on one side. Thanks.