Yesterday we reported that Microsoft is all set to roll out Mango 7.5 update for Windows Phone in a week or two but today it seems that AT&T has already started to target Windows Phone devices that are set for Mango update on Sept 27.

Windows Phone  7.5 Mango Update

AT&T Windows Phone users will start getting notification message from Sept 27th for HTC Surround, LG Quantum and Samsung Focus 1.3 devices. AT&T also has planned to roll out Mango update for HTC HD7 only in early to mid October and the Samsung Focus will receive an update for the same by October end. Other Windows Phone device manufacturers like Dell will roll out the update for Venue Pro directly.

Again, Microsoft has warned Windows Phone users not to install the leaked copies of Windows Phone 7.5 and they should wait for official RTM version to launch. So, to use Windows Phone 7.5 properly Windows Phone requires the proper firmware to function.

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Via WPCentral