Will Iphone 7 plus work if I bring it out of country? It is locked with T-Mobile as the carrier. Only use Wi-Fi since I bought it?

Will Iphone 7 plus work if I bring it out of country? It is locked with T-Mobile as the carrier. Only use Wi-Fi since I bought it?

It will work on wi-fi, but you can't use it with a local sim card if it's carrier locked.

Yes. Of course, you can only use it on Wi-Fi. You'll need to get it unlocked if you ever want to use it on a different carrier.

Yes it would work.

As far as calls you could either go with roaming or VoIP (via Wi-Fi)

It'll still work but will still be locked, with iphones on T-mobile its relatively cheap to have them unlocked to any network