i hav resently gotten a iphone 3g and was trying to load apps onto it but in the process when i would click dowload a message would pop up telling me my iphone is incompatible or needed to be updated to 4.3 so i went on itunes try to update my phone and it told me that 4.2.1 is the latest software can anyone help me figure out why my iphone 3g will not update
