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If your phone is rooted, you can't update it by FOTA method. To process a factory data reset before running the update also might be neccessary. If nothing helps, flash your phone with SP Flash Tool and after the first boot up, skip the whole setup process, except connecting to a WiFi router and try to update your phone again.
SP Flash Tool ROM: http://community.umidigi.com/thread-2830-1-1.html |
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