I found this on T-Mobile's G2 Support Community:
http://support.t-mobile.com/docs/DOC-1809
"On July 27, T-Mobile G2 devices will begin to receive an Over-The-Air (OTA) update to Android 2.3.3 (Gingerbread). The update will roll out to customers in waves over the coming weeks.
The update provides the following enhancements and improvements.
New features:
Android 2.3.3 (Gingerbread)
Tell HTC
Google Books added
Notification bar color scheme is changed to black
New battery indicator, phone, and web icons
Color-coded network icon and signal indicator added. Green when connected to Google servers. Grey when not connected.
Pressing the power key while on a call disables the proximity sensor
Fixed or improved issues:
Wi-Fi calling improvements
New SMS and email notification improvements
Improvements to sending MMS from the Gallery
Your phone will show a notification when you have received the update. Alternately, to check if your phone has the update, follow these steps:
From Home screen, press the Menu key.
Tap Settings.
Tap About Phone.
Tap System Updates.
Important: Do NOT call T-Mobile to receive the update before September 1. The timeline for receiving the OTA cannot be expedited. T-Mobile cannot manually push the software to customers who ask to receive it.
Software upgrades at retail stores
Beginning August 5, you will be able to go to a T-Mobile retail store to update your T-Mobile G2, T-Mobile myTouch 3G Slide, and T-Mobile myTouch 4G to the most recent software version. This helps if you have not gotten the Over-The-Air (OTA) update or if you cannot perform the USB tethered update.
If the OTA or tethered update fail, here is what to expect at the retail store:
Updating at the store can erase all the data on the device. The SD card will not lose data.
Back up your data, synchronize your contacts to Google or T-Mobile Backup, and write down the names of all the applications you will want to re-install.
The update can take up to 30 minutes to complete.
The update requires that your phone has over 50% battery life at the store.
The rep at the retail store will:
Remove your personal SD card.
Insert a software update SD card.
Wait for the update to download and install on the device.
Remove the software update SD card.
Insert your personal SD card again."
http://support.t-mobile.com/docs/DOC-1809
"On July 27, T-Mobile G2 devices will begin to receive an Over-The-Air (OTA) update to Android 2.3.3 (Gingerbread). The update will roll out to customers in waves over the coming weeks.
The update provides the following enhancements and improvements.
New features:
Android 2.3.3 (Gingerbread)
Tell HTC
Google Books added
Notification bar color scheme is changed to black
New battery indicator, phone, and web icons
Color-coded network icon and signal indicator added. Green when connected to Google servers. Grey when not connected.
Pressing the power key while on a call disables the proximity sensor
Fixed or improved issues:
Wi-Fi calling improvements
New SMS and email notification improvements
Improvements to sending MMS from the Gallery
Your phone will show a notification when you have received the update. Alternately, to check if your phone has the update, follow these steps:
From Home screen, press the Menu key.
Tap Settings.
Tap About Phone.
Tap System Updates.
Important: Do NOT call T-Mobile to receive the update before September 1. The timeline for receiving the OTA cannot be expedited. T-Mobile cannot manually push the software to customers who ask to receive it.
Software upgrades at retail stores
Beginning August 5, you will be able to go to a T-Mobile retail store to update your T-Mobile G2, T-Mobile myTouch 3G Slide, and T-Mobile myTouch 4G to the most recent software version. This helps if you have not gotten the Over-The-Air (OTA) update or if you cannot perform the USB tethered update.
If the OTA or tethered update fail, here is what to expect at the retail store:
Updating at the store can erase all the data on the device. The SD card will not lose data.
Back up your data, synchronize your contacts to Google or T-Mobile Backup, and write down the names of all the applications you will want to re-install.
The update can take up to 30 minutes to complete.
The update requires that your phone has over 50% battery life at the store.
The rep at the retail store will:
Remove your personal SD card.
Insert a software update SD card.
Wait for the update to download and install on the device.
Remove the software update SD card.
Insert your personal SD card again."
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