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I have an Android device which had a custom os..It was for educational purposes and I could not even open another app on it. After the end of the subscription period I thought of using the device. I tried opening it's recovery mode but instead opened some factory or diagnostic mode which was in Chinese. By mistake I pressed the power key to select an option ending with "emmc" and now It boots but shows a black screen with navigation buttons and time...Any keys pressed make no effect and I am unable to shut it down. When I press the power key for a few seconds it reboots but shows the same screen. I just want to shut it down somehow. Please Help!!

Edit: I found a way to shut my phone down. I connect it to my pc and then press the power button for 10 seconds then the screen goes off and the charging percentage shows up after a couple of seconds, I pull the usb cable out and the screen disappears and voila ! My phone is switched off.

Thanks for all your response.

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  • Seems like a clone... What phone is that?
    – esQmo_
    Commented May 1, 2017 at 15:07
  • It is a tablet : Lenovo tab 2 A7-10
    – AnuthaDev
    Commented May 2, 2017 at 1:51

1 Answer 1

Reset to default
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Just pull off and reinsert the battery.

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    -1: you shouldn't presume that the battery be removable, without knowing the device model.
    – Grimoire
    Commented May 1, 2017 at 20:11
  • Correct. The battery is non-removable
    – AnuthaDev
    Commented May 2, 2017 at 1:52
  • Thank you guys for admiring my effort to help - you too kind. And, by the way, suggesting something so probable is a good way to save time. It's not like there's many options - battery is either removable or not so it was wise not to specify that first. Because as result, there are only one my comment posted instead of two or three.
    – Vyacheslav V.
    Commented May 2, 2017 at 3:07
  • And, after all, you can always try to reboot your phone continuously for battery to get empty more quickly or, which is more likely option - just leave your phone turned on for night. But I'm not sure if this will help after all. You can try it still since there's​ not much of options available.
    – Vyacheslav V.
    Commented May 2, 2017 at 3:11

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