iTunes
Q: updating a old iphone
how do i update a old iphone?
iPhone 3GS, iOS 7.1.2
Posted on Jul 19, 2016 3:43 PM
by Phil0124,Apple recommended
iPhone
Update the iOS software on your iPhone, iPad, or iPod touch - Apple Support
Scroll down to the section titled: Update your device using iTunes
Posted on Jul 19, 2016 3:46 PM