I bought a Lumia 635 from AT&T (it is marketed as a GoPhone) that I am able to use it with a regular AT&T sim card.

Under the "extra+info" section of my phone, SIM unlock is listed as installed. Does that mean that I'm able to use this with another GSM carrier overseas (outside of US)? or do i need to get another unlocked code?


AT&T go phones come locked. In order to unlock them, you must have service on that device for six months, then call customer support. It can be unlocked remotely.

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