im thinking about JB my ihpone 3g but i have some questions before i do so. if i jailbrake will my iphone still be able to download apps from the appstore? when i want to update a new firmware do i have to un-jailbrake? -if so will it wipe all my iphones data? numbers,texts,apps? if i jailbrake would i be able to get apps from the appstore, from another source,(as if i couldnt DL from the appstore) -if yes, what about apps that cost money? EDIT: also how could AT&T /Apple know if i jailbroke it, because it voids my warrenty, if something malfunctioned how would they find out?