Restore as new iphone or from backup?
Maybe a dumb question, but I'm a little confused with my iphone.
Its a JB(redsnow) 3g, on 3.0.1 and its getting a little buggy - apps quitting, sluggish etc. so I thought I should erase and start again. Here's where it gets foggy for me:
If I get hold of a new 3.0.1 IPSW and restore as new iphone (DFU mode or otherwise), thus cleaning out any unwanted bits and bobs, can I then sync with itunes, get my contacts and apps back from an old backup then JB and cydia? Or will syncing with an old backup put everything back on my phone, or is it just the legit apple stuff and contacts etc. that get put back on?
Thanks for any help :)