Phones from other providers might be locked to another network.
If it's locked and you insert your new SIM, you might see one of these on-screen messages:
- ‘SIM not supported’
- ‘Please enter your network unlock code’
- ‘Enter SIM network unlock PIN’
To unlock your phone, you'll need to contact your old provider or where you bought your phone from.
Before you activate your SIM, you'll want to make sure your phone’s unlocked, or you’ll start being charged for your plan but you won’t be able to use calls and texts.
Where did you buy your phone?