Adcom Thunder A400

March 29, 2016 | Filed in: Android.

How to enter Adcom Thunder A400 Recovery Mode, Hard reset and Remove Unlock Pattern.

Recovery Mode Adcom Thunder A400

  1. Turn off the device
  2. Press and hold Volume UP key and Power key at the same time for a few seconds
  3. Release all key when the boot mode menu appears with 3 options
  4. Use Volume Up key to select Recovery and press Volume down key to confirm
  5. Press power key when you see android logo to enter Recovery Mode
  6. Use Volume down key to select Menu
  7. Use Volume Up key to Confirm


Hard reset Adcom Thunder A400 using External Keys ( remove your forgotten pattern unlock )

  1. In Recovery Mode, use Volume down key to select wipe data / factory reset
  2. Press Volume Up key to confirm
  3. Use Volume down key to select Yes — delete all user data
  4. Press Volume Up key to confirm
  5. Use Volume down key to select Reboot system now
  6. Press Volume Up key to confirm

Hard reset using Settings Menu

  1. Turn on the device
  2. Select Apps
  3. Select Settings
  4. Select Backup and reset
  5. Select Factory data reset
  6. Select Reset device
  7. Select Erase Everything or Delete All

Warning! If you perform a hard reset, make sure to back up important data. The data can not be recovered after perform a hard reset. If you forgot your unlock pattern, It will remove your forgotten pattern unlock.



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