[Freezing] 3 times in 3 days
1.12 OTB jailbroken phone .. I got it three days ago but it seems to be freezing on me every few hours.
While using Wi-Fi applications, i.e. youtube/map/itunes, everything works fine but then sometimes it freezes and either I have to reboot or the phone reboots itself. The Wi-Fi no longer appears and I need to reset Wi-Fi (i.e. go to General and then click on "Reset Network Settings").
I do not know much about jailbreaking so I took it to someone who has done jailbreaking hundreds of times. He redid the jailbreak but I still have the issue.
Does anyone know if this could be a hardware problem? Is there anything I can do? I am not even sure if I can take it to Apple Store given I was not the original buyer of this phone anyway ... please help