Iphone 3gs 3g and wifi not working 4.3.5
My iPhone was unable to browse the web unless I disabled data and used wifi, or killed the wifi and used data. Even when browsing with wifi I would get the ATT icon and not the wifi icon. If I didn’t have the unlimited plan I bet this would have ate up my data plan like a rat in a feed mill.
This problem presented itself after updating to 4.3.5 IOS.
What I did to fix it is probably very obvious, but I will share. I plugged the iPhone in to my computer, synced and backed up. Restored to factory, and restored back up. Ever since then its been working fine!