Resp.
http://www.recovery-mode.com/android/lenovo-a536.h tml
Ked toto nejde tak si budes muset zohnat original firmware a naflashovat to utilitou ktora spolupracuje s tym recovery modom. Ked to nepojde vygooglit tak budes muset servis nech to preflashuju oni.
Turn off the device
Press and hold Volume UP key + Power Key
Release all key when you see Android System Recovery mode
Use Volume down to scroll and Volume Up key to confirm
Hard reset Lenovo A536
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