how to unlock celkon a35k pattern lock

press volume up and power 

now u see black display wait this is (safe mode) 

now phone is on in safe mode now u see 5 option dont use it

slide upper option bar click upper right menu option 

then click setting option showing like gears 

go in more/about phone/click 7-8 times on build number 

now developer option created 

on the debugging mode

open volcano 2.6.2 select android tab select select shift mode to recovery 

now u see android logo on phone push volume up ....... now u know what to do