Looks like T-Mobile and HTC are giving us a new update for the T-Mobile G1. Unfortunately, this is not a cupcake. There are rumors about the cupcake is not going to be available for the G1 but it will be for future G phones. That is really bad news for T-Mobile G1 owners, but nothing official has been released.
“To ensure a great experience with the T-mobile G1 with Google, customers with these devices will receive an Over the Air (OTA) update to their devices between February 5 and February 15. The OTA will include new system enhancements such as the ability to save pictures or files by long-pressing an item, check for system updates, and use the Google Voice Search feature. The OTA will also fix a number of known issues. New G1 activations will receive the OTA up to three days after service has been activated.”
The update, Firmware version 1.1 / RC33, was released to a small number of users today, but will be sent to all G1 users over the next two weeks. The update includes several bug fixes and feature enhancements, but is not ‘Cupcake’.
You need not take any action as the update is issued at random and will reach everyone in due time.
Just wait until your phone will show it needs an update.