Default ReGain Root access [Guide]

Root access losted after installing stock/custom rom ? Or by flashing the old backup???
OK OK I know that because that's why you are here
Don't worry you don't have to reroot it again :thumbup:
Just do what I said below
 1 . I think the custom recovery will there (may be the cwm or twrp )
 2 . Download the RootGainer zip from here .
 3 . Flash it using the recovery and reboot your device
Now you are going to amaze
Note :- This zip will only replaces the su values ... Flashing this zip may or may not be cause brick . I am not gonna take any responsibilities . Just think what you are doing before flashing.
It works on my Galaxy S Duos and maybe work for yours (my processor is arm )

For more questions feel free to use the comment box below

Hitting Thanks button is much easier than typing Thanks .

Device 1 : SGS Duos GT-S7562
Android ver. 4.0.4
Rom : MightyBoy
Device 2 : iKon ik-A800 (TAB)
Rom : Stock .
Android ver. 4.1.1
SystemUI (s7562) :CriTix v2.0.0

rom for GT-S7562