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iphone update 5.1 - Even though network speeds will continue a similar, the AT&T has reclassified the connection as 4G for the back of the ongoing battle between networks to find out what speed constitutes 4G.

iphone update 5.1 - Some iPhone users will see a 4G symbol be visible on their display (Pic: Oli Scarff/Getty Images)
Which means that upgrading for the iOS 5.1 platform will under no circumstances affect the handsets' data connection, but users on AT&T which are linked to the HSPA network are seeing the 4G symbol displayed within the status bar.
'AT&T has rolled out a nationwide HSPA+ network, plus they refer to this high-speed network as 4G,' an Apple spokesperson told tech website The Verge.
'With iOS 5.1, iPhone 4S will see this reflected within the status

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