Originally Posted by clsA
Yeah any firmware or ruu that include dzdata files wipe everything. You could cook up your own version of RUU using the decrypted rom.zip and remove the dzdata - hboot - recovery and not worry about the full wipe or the updated hboot that doesn't work with revone. Of corse you wouldn't be able to get OTA using this method though.
i whipped up a "rescue" file for an s on member,wich only included boot,system,and recovery. when i tested this file,it also completely wiped my sd,much to my surprise
it may have been a fluke,since that was an international m7_u,but id back everything up just in case