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I have an old Samsung phone with a broken screen and pass code but before I try to unlock my phone I want to know if there is any possible way to know if it has been factory reset because if it has then I won't need to open it. I would also like to add that I have a different phone that has been factory reset so is there anyway to know if it has a backup?

Tech_Gadget
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  • How old? some phones can be flashed on locked bootloader, means availbility to flash adb enabled boot or recovery. some phones aren't encrypted, allowing raw dump of userdata partition – alecxs Mar 29 '21 at 11:36
  • Honestly I'm not sure but it looks quite old, it has a duos symbol in the right hand corner and it's smaller than Tha palm of my hand with a rectangular Shape. Can I send u a Pic? – Tech_Gadget Mar 29 '21 at 13:04
  • this should work for any Spreadtrum chipset, except no fastboot available, but you can gather information from heimdall and/or custom recovery (or even dump/flash boot partition straight from adb commands while on custom recovery) https://android.stackexchange.com/q/232319 – alecxs Mar 30 '21 at 13:04
  • combination firmware should have adb enabled by default, can be flashed without data loss. SuperSU for j1minive3g should work too, but not sure about this will wipe data – alecxs Mar 30 '21 at 13:28
  • you should be able to reach download mode and flash TWRP custom recovery with heimdall. you can't copy files if device is encrypted, but you can modify boot or system from twrp adb shell. report back once you have adb shell, will give you instructions – alecxs Mar 30 '21 at 13:32
  • First of all thx for all your help. I'm not gonna lie tho but you seem very knowledgeable on the subject and I really barely understood anything (no offense, I just don't know much) so in summary I just need to find and download "adb shell" on my pc and then come back? – Tech_Gadget Mar 30 '21 at 13:59
  • follow first link and download platform-tools. use any mobile phone for testing. enable usb-debugging in developer options and connect usb cable. execute adb.exe adb devices and authorize connection on phone screen. now you should be able to open adb shell you will see $ prompt. you can browse files for example cd /sdcard and ls. now you understand how successful adb looks like. you can now connect the broken phone and see if adb devices show something (probably not). But you can follow my last comment and flash TWRP. after flashing, boot into recovery and check adb shell is working – alecxs Mar 30 '21 at 15:51

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