go to whatsapp setting >take a manual back up>move the folder whatsup from internal storage to ext sd card> flash rr>gapps>reboot>move whatsapp folder to int storage>install whats app >it will detect the back up >profit
@Preshak ....u dnt need ur regstd sim...copy d whatsapp foldr to sd card...install d nw rom...copy d foldr bk to intrnl...sign into google...sync d contacts....den install whtsapp again..it will detect d bkup....make sure u hv d contacts...den nly it will wrk..
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