TmoNews has posted a leaked memo that states G1 owners will begin receiving a minor over-the-air (OTA) update this week. The update (build number DMD64) focuses on improving call performance and does not include any additional fixes. These updates are normally rolled out on a staged schedule, so it could be a week before it hits everyone’s device.

Details of the update include:

• This software update improves customers’ call performance only and does not include any additional feature enhancements.
• The Android 1.6 DMD64 OTA will be sent to G1 customers only and will not be sent to customers using other Android devices at this time.

Leaked memo from TmoNews.