Suddenly your Bytwo BS400 6.0( 1GB ) RAM is crashed with a virus or hanging problem or boot loop, hang logo, restart problem then you need to flash firmware to fix your device. hard reset not working and doesn’t enter recovery or any kind of software issue then you need to must install stock firmware to repair your smartphone. a Smart Phone’s not working good properly without a good firmware. so android firmware program is a part of life smartphone.
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