[Q] Can I change my phone to think it is an ATT instead?

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http://forum.xda-developers.com – Hello, I finally was able to get AT&T to fix my provisioning (a manager setup a ATT IMEI for my GT-N7000)... Now I am on the LTE APN, and have VVM setup instead of being stuck with ATT Messages. I found a recent APK of at&t visual voicemail, but would like to be able to update this app via the play store... Is there a way to edit the build.prop to believe that I am on an AT&T branded phone? if so, can someone upload such a build.prop (I am on LRK 4.0.4 open germany rooted) and give instructions on how to make it work without soft bricking my phone using root explorer? I reall (HowTos)