Samsung Galaxy S21 Guides

micro SD card

Ultimate Guide for Using SIM Card on Galaxy S21

SIM Card on Galaxy S21You need to use a SIM card on Galaxy S21 if you want to use mobile data, receive SMS, or make voice calls through a cellular network.

This Galaxy S21 how-to guide explains everything you need to know about using a SIM card on Galaxy S21: the supported SIM card size, eSIM support, insert or change SIM cards, use two SIM cards, and check SIM card status on Galaxy S21.

This guide applies to all three Galaxy S21 models (Galaxy S21, S21+, and S21 Ultra). But in different regions or on different carriers, the mobile network features may be slightly different.

Galaxy S21 supports 5G SA and 5G NSA, as explained in this post.

What’s the supported SIM card size for Galaxy S21?

Galaxy S21 supports nano-SIM cards only (for the physical card) and eSIM (if your carrier supports it).

A nano-SIM is currently the smallest SIM card for mobile phones. Most phones released in the last few years have adopted nano-SIM already.

So, you can use your existing SIM card if you migrated to Galaxy S21 from the following phones (just some examples):

  • Samsung Galaxy S6, S7, S8, S9, S10, S20 and all their variants.
  • Samsung Galaxy
… Read the rest

Galaxy S21 vs Galaxy S21+ vs Galaxy S21 Ultra

Galaxy S21 vs Galaxy S21+ vs Galaxy S21 UltraLike Galaxy S20, Samsung released 3 models of Galaxy S21: Galaxy S21, S21+, and S21 Ultra. Many potential buyers are not sure which one to get when considering Galaxy S21 vs Galaxy S21+ vs Galaxy S21 Ultra.

This Galaxy S21 guide explains the major differences of Galaxy S21 vs Galaxy S21+ vs Galaxy S21 Ultra and explains which model is the right one for you.

Galaxy S21 vs Galaxy S21+: the difference is on the size and material of the back cover.

Among the 3 models, Galaxy S21 and S21+ share almost identical components except for the size of the screen and the material used for the back cover.

Galaxy S21+ has a 6.7″ flat OLED screen. The screen of Galaxy S21 is noticeable smaller at 6.2″.

Except for the size, the displays on Galaxy S21 and S21+ are identical. The resolution is FHD+ (1080 x 2400, 20:9). The same Dynamic AMOLED 2X panel with brightness up to 1300nits is used. Both support a 120Hz refresh rate (adaptive refreshing 48-120Hz). HDR 10+ is also supported.

The biggest difference between the Galaxy S21 and S21+ is about the material of the back cover.  Galaxy S21 has a plastic back cover and … Read the rest

Top 6 disappointments of Galaxy S21 Ultra

Top 6 disappointments of Galaxy S21 UltraGalaxy S21 Ultra is Samsung’s only hope to reverse the declining sales of Galaxy S phones since Galaxy S10. But it seems Samsung lost the opportunity due to the numerous disappointments of Galaxy S21 Ultra.

This post summarizes the top 6 disappointments of Galaxy S21 Ultra: curved screen, no micro SD card support, lack of essential accessories, no 45W superfast charging,  with S Pen support but without an S Pen, inferior under-display fingerprint sensor.

Curved screen: the No.1 disappointment of Galaxy S21 Ultra

Since Galaxy S6 Edge (or even Galaxy Note Edge), Samsung tried hard to sell the curved screen.  It is unique.

But most Galaxy phone owners don’t like it.  Very few Galaxy phone owners bought the phone because of the curved screen.

Initially, Samsung told us they would add some new and innovative features like Edge screen. Now, it is purely cosmetic (infinity display).

If Samsung had listened to customers, they should have stopped using the curved screen on any mainstream phones 3 or 4 years ago.

Unfortunately, Samsung is too stubborn and try luck on the most important flagship phones.

On the three Galaxy S21 models, Galaxy S21 … Read the rest