my 2 yr old iphone 3GS has been doing very strange things for the past 3 months or so. I've gone to Apple phone tech, and they had me do a factory default restore. My app store crashes after attempting to open the "purchased" menu from the Updates tab. I was downloading a new app, and suddenly on the home screen, there appeared an app downloading that I hadn't even searched for. My iPhone has rebooted itself while using the apps. Several of my apps have crashed, even after re-installing. What could this be? I'm due for an upgrade soon, so I don't really want to be putting too much effort into this one, but I want it to work normally until then.
Also, I cannot update my iOS software cause my iTunes is crazy. I have redownloaded it twice now.