How to tell if your phone is unlocked

[judyg951]

I followed the procedure from AT&T to unlock my iPhone 6's How can I tell if they are unlocked though? I don't see anything that is different on them.

 

[noobinator]

If you restore in itunes on a computer you will see a popup saying it's unlocked. Otherwise using another carriers sim card is the only way to know.

 

[goudok]

Insert your house key, if it turns its unlocked, if it doesnt then its still locked. You wont see any difference, until you put in a non ATT sim.