What to do if the device is locked by the network or operator and cannot use eSIM/physical SIM card?

1. Contact the original device operator to apply for network unlock (some operators require meeting the contract period).

2. Confirm the network bands supported by the device are consistent with the destination operator to avoid band incompatibility.

3. If unlocking is not possible, switch to an unlocked device.

4. Purchase a global package that supports multiple bands to improve compatibility.