It would still be "locked" to the AT&T network (or whatever network you initially used your phone on). With an unlocked phone though, you can change service whenever you want. It gives you the ...

Suitable for younger phone users, travelers, and those in need of a secondary device, this refurbished iPhone 12 works with all carriers.

Scoop up an unlocked refurbished one with 64GB and limited blemishes for just $794.99. Originally released in 2017, the iPhone X still remains an impressive phone. It features an all-glass design ...

But according to a line on the Apple website, an unlocked version of the phone will be available in November. If you travel often for work or pleasure, the unlocked model is certainly the way to go.