The error message Cellular Plans From This Carrier Cannot Be Added appears when you try to add an eSIM or data bundle that your device or carrier does not support. This can happen for several reasons.
Incompatible device
Some eSIMs only work with specific device models. If your device is not compatible, you may see this error.
Device locked to a carrier
If your device is locked to a specific carrier, it can only use SIMs and plans from that carrier. If you try to add an eSIM from a different carrier, this error may appear.
Carrier restrictions
Some carriers limit the types of eSIMs and plans that can be added to a device. For example, a carrier may allow postpaid plans but block prepaid plans, or may restrict adding third party eSIMs.
What to do
If you see this error, contact your device provider or carrier support. They can confirm whether your device is locked, whether the eSIM is compatible and whether the carrier allows the type of plan you are trying to add. In many cases, the solution is a device unlock.