Â It seems Windows Phone team is going to deliver the Mango update to AT&TÂ HTC HD7s devices on Oct-11. According to the internal memo of AT&T, Microsoft is scheduled to deliver it on Oct-11. Winrumors has obtained theÂ internal memo,
On October 11, 2011, Microsoft is scheduled to begin rolling out the new Mango 7720 update to AT&T customers with existing HTC HD7S Windows Phone 7 devices. The update supports the same enhancements that began rolling out to AT&T customers using HTC Surround, LG Quantum, and Samsung Focus devices in late September.
Important: To help ensure quality control, Microsoft is releasing the update in controlled batch quantities over several days. During the initial rollout period, the update is only available to customers once they receive a notification that an update is available on their device. The update will be available to all AT&T customers with existing HTC HD7S, HTC Surround, LG Quantum, and Samsung Focus devices after the controlled rollout has completed.
The new Microsoft Mango update for the current WP7 devices requires a two-phase installation. The update installation process includes:
â€¢ Installing Zune software to a computer.
â€¢ Connecting the device to the computer and installing the Mango update that adds new device functionality.
Note: If the Zune software has been previously installed, it does not have to be reinstalled prior to connecting the device to the computer to receive the Mango update.â€
Also there is no word on Samsung Focus 1.4 devices yet, so it must be under testing.