I've got the unlock code. Where and which other brands of SIM cards are compatible with my Galaxy Note 10?

Hello @Chrissy9320

After unlocking a device you can take it with you to any carrier. You can obtain a new SIM card from the new company.

For the Samsung Galaxy Note 10 you will need to have a nano-SIM card according to the manual.

Let us know if you have any more questions and stay safe!

Ayla, AT&T Community Specialist