cant find any place for me to upgrade the ios 6/7 in my iphone 4.
my iphone 4 need jto download the new ios version, either ios 5.11 or 6 or 7 is okay.
However, wasting too many time to enter my ID and password, (over 1 hour), following the screen demo to find the application in my iphone, still cant find any place where I can download the new version of ios 5.11 or 6 or 7.
Kindly please help urgently. Thanks
iPhone 4