1. AC Question's Avatar
    Galaxy S6 running lolipop...factory unlocked At&t phone but using t-mobile service. How do I upgrade from lolipop to marshmallow. Tried "about phone" "software update" but it's for the AT&t server and is rejected. I've tried Smart Swith and it says software up to date 5.02.
    05-01-2016 04:08 PM
  2. Rukbat's Avatar
    Since neither AT&T (it's not on their network) or TMobile (it's not their phone) will update it, try the AT&T S6 developers forum at XDA Forums.
    H3aTeRzz likes this.
    05-02-2016 07:37 PM

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