place a SIM card in a tmobile iphone in London from another company

  • 19 October 2021
  • 1 reply


I placed a SIM card into my iphone 13 mini from a different company while in London and it did not work.  The phone said that I cannot use a different SIM card on this phone. 

Do I need to ask Tmobile to turn off some sort of protection on this phone?  is the phone locked somehow?

1 reply

Userlevel 6
Badge +11

it needs to be unlocked in order to accept a different sim.


What's a Device Unlock

  • Device Unlock lets you use your device with another carrier, for things like international travel or selling your device.<<<<<<~~~~~~~
  • Not all devices are compatible with every wireless provider; your device will need to support their network frequencies and technologies. 
  • This is different from Domestic or International roaming, where you use a T-Mobile SIM/eSIM to access a different wireless provider's network.