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Oppo A31 presented, with a 4000 mAh battery on board

Oppo A31 presented, with a 4000 mAh battery on board

Oppo A31 is a new medium-low end smartphone. The most experienced will surely remember this smartphone initially proposed way back in 2015, and now re-launched with new features. In other words: same name but a different device. The smartphone, currently available in the Fantasy White and Mystery Black colors, is already available for the Indonesian…