I have Android 8 mobile phone and I need to give it for mobile repair center for battery replacement. There is chip car, but there are lot of data in my phone.

What I want to know is it enough having Android Lock Screen? Can repairmen access my data?

  • As you are concerned about data stored in your phone, do not try factory reset. Do you have ADB, the USB port debugging turned on?
    – Refineo
    Feb 17 '20 at 8:13
  • In case you have android root access or ADB access to your phone, then go to in data/system and delete locksettings .key file(s) then the password won't be needed.
    – Refineo
    Feb 17 '20 at 8:17
  • How are they supposed to fix the problems without accessing the phone? Feb 17 '20 at 15:21
  • Is /data encryption enabled? Feb 17 '20 at 21:43
  • @multithr3at3d How can I enable it?
    – Damith
    Feb 18 '20 at 2:40

Regarding your given information it's kinda hard to answer your question. Since Android 7 File-based Encryption have been supported. It depends on the vendor of the phone if this is activated by default. I googled a bit about your phone (Huawei Mate 10 Lite) and haven't found official information about that. On reddit are some questions which state that this phone needs to use this type of encryption. So if I'm refering to this and the fact that you set a secure password on your phone it is safe to hand the phone over to a repairman.

But note: If you hand it over, take care that you cannot see traces of your finger on the damaged display. If you see 4 touches at the position of the pinpad it won't be hard to guess your password. So clean the phone before you give it to them.

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