I just got my iPhone unlocked, and put a new SIM card in it. How do I know if the new SIM card is working?

Blazeejane3 wrote:

My new simcard appears to be invalid despite of the fact that it is working

If its working it means its valid.

What makes you think its invalid?

Are you getting an error? If so what is it?

Can you make calls? Send Messages?

If you got no error message, and the name of the cell carrier the sim card is for appears at the top and has service, that means it working.

Do you have phone service?

Do you see a message indicating "SIM not supported?

My iPhone 6 sim not su

My new simcard appears to be invalid despite of the fact that it is working