How to enter Pentagram Combo 4-core Recovery Mode and Hard reset.
Recovery Mode
- Turn off the device
- Press and hold Volume UP key + Power Key
- Release all key when you see Android logo
- Use Volume key to select Menu
- Use Power key to Confirm
Hard reset Pentagram Combo 4-core
- In Recovery Mode select wipe data / factory reset
- press Power key to confirm
- select Yes — delete all user data, press power key to confirm
- select Reboot system now to finish hard reset
Warning! If you perform a hard reset, make sure to back up important data.