If you went and wiped cache only, not data, and installed a new rom, would all data remain? What exactly is this cache that nandroid wipes? I'd like to install a rom for a friend but dont want to completley wipe his phone. I just want to install the virtuous rom, which is basically the stock 2.2 update rom and would like to keep all his data on the phone. would just wiping the cache work? I know some people just install without wiping but would wiping cache help? And I know a wipe is always better, thats what I do on my phone. But its not mine and would like to save his data.