I am using an Oppo f3 plus smartphone and I cannot upgrade to Android 8.0, I am currently using Android 6.1
Maybe you can try your luck with custom ROMS, but it might not be easy if you haven't done this before.
I am utilizing an Oppo f3 in addition to cell phone and I can't move up to Android 8.0, I am at present utilizing Android 6.1
So how is it going now? Have you tried any custom ROMs?
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