Go to Settings > System > Reset options > Erase all data (factory reset) > Erase all data. After the erasing process, set up ...
4G bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 30, 32, 34, 38, 39, 40, 41, 42, 48, 53, 66 - A3290 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20 ...
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