It's going to be location specific. I sat my Verizon Note 3 right next to a coworkers (at work) who had the AT&T version and my dbms were 10 to 15 better. Pretty solid data.I don't see much difference between my friends note 4 with AT&T and mind in battery to matter. It's only 1 or 2 places I go to once a week or 2 times ?
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From what I've heard, if you've gotten your Nexus 6 from AT&T, as soon as you put in your Sim card, the AT&T apps will download to the phone through the play store. They aren't buried in the partition so you'll be able to just completely uninstall them and be left with pure stock android.
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