If your phone is carrier-locked, you will not be able to install the StaffTraveler eSIM. Carrier-locked devices can only use SIM cards provided by the carrier that locked the phone.
Here are some steps you can take:
1
Ask your carrier to unlock it
Contact your carrier and ask about unlocking your phone. Most will unlock a device once you have finished your contract or paid it off. There may be a charge for this.
2
Check that your model supports eSIM
An unlocked phone still needs to support eSIM. Check yours against the compatible device list.
3
If unlocking is not an option
Use a different unlocked, eSIM-compatible device. You can also use one as a hotspot and connect your locked phone to it.
For more information on AT&T's unlock policy, visit AT&T Device Unlock.