iOS 5.1 Upgrade On HSPA+ Claims "4G" Status on iPhone – Information Week

March 10, 2012 Posted By: Leave a comment
iPhone 4S owners who installed their iOS 5.1 upgrade may notice something else they weren't expecting: a signal indicator that shows they're now on AT&T's 4G network. Apple's own release notes for iOS 5.1 in this regard were quite coy ...
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