You need to insert a SIM card to Galaxy S10 SIM card tray to use the mobile network (voice, SMS, and mobile data).
In the Galaxy S10 box, a SIM card is not included (although the SIM card tray ejection pin is included). You have to get one from the carrier. Of course, it is not free.
This Galaxy S10 how-to guide explains everything you need to know about Galaxy S10 SIM card: the size of the SIM card used in Galaxy S10, add or change the SIM card for Galaxy S10, check mobile network connections on Galaxy S10, use the SIM card tray for the single-SIM and dual SIM versions of Galaxy S10.
What is the SIM card size for Galaxy S10?
Most phone companies now offer 3-in-1 SIM cards as illustrated below. You can detach the smallest part and use it on Galaxy S10.
After detaching the nano-SIM card, do not throw away plastic parts, which can be used as a SIM card adapter for old devices that may require a micro or even mini-SIM card.
You can use the existing SIM card for Galaxy S10 if you migrated to Galaxy S10 from any of the following phones,
- Samsung Galaxy S6, S7, S8, and S9 and all their variants (e.g., S9+, S8+, S7 edge, S6 edge, and S6 edge+).
- Samsung Galaxy Note 5, Note 7 FE, Note 8, and Note 9.
- Any of Samsung Galaxy A series: Galaxy A3, A5, A7, A8, and A9.
- Galaxy J3 2017 and later, Galaxy J5 2017 and later, Galaxy J7 and later.
- iPhone 5, 6, 7, 8 and X (and all variants).
- Moto X (all generations).
- Moto Z (all generations)
- Moto G5, G6, and G7.
- Moto E4 and E5.
- Pixel and Pixel XL (all generations).
- LG G5, G6, G7 (all variants), V10, V20, V30 and V40.
- Many other phones released after 2016.
If you are not sure whether you can use your existing SIM card on Galaxy S10, please post your phone model in the comments box below. We will try to check it for you.
Due to the size difference, you must use a nano-SIM on Galaxy S10. The SIM card tray was designed for this SIM card size only.
If your old SIM card is a micro SIM card, and your carrier charges you for changing to the nano-SIM, you may trim the old SIM card to a nano-SIM card. It is recommended to do it in the handphone shop. They usually use a specialized clipper, which is more accurate and safer than your scissors.
If your old SIM card is a mini-SIM card, you need to check with the handphone shop. Some old mini-SIM cards have larger metal part than a nano-SIM card. If this is the case, then you cannot trim it to a nano-SIM card. You have to change … Read the rest