I am building two s7 edge phones for my niece and nephew for Christmas. I have built and rebuilt dozens of the s7 edges and I occasionally come across a motherboard that will not update. I try the update periodically throughout the day or even several days and eventually it will start downloading the update. If your coming from 6.0.1, please understand that you have a long road ahead as each operating system needs to update before the next. Ie: 6.01 then all the various security updates then on to 7.0 followed by all the normal updates and then finally 8.0 followed by normal updates. This process takes some time but has worked every time for me. I have yet to find a motherboard that I cannot eventually update.
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