Can I Update my T-Mobile G1/HTC Dream so it runs Android 2
You can run CyanogenMod 6.0, which is Android 2.2 also known as FroYo.
A couple of tipps of mine : If you do not desire it to be dreadful slow-moving, disable dithering and also all results in the setups. Possibly enable the in the nick of time compiler (jit). With the application titanium back-up you will certainly have the ability to remove some "waste" applications which feature the centimeters release which is additionally helpfull.
No. You have to root your phone and also install a mod such as CyanogenMod to get your phone running a semi-equivalent of Android 2.1+. There is no supply rom for Android 2.1+ for the G1. In addition, if you do select CyanogenMod, not all attributes are totally sustained as a result of equipment constraints, such as LiveWallpapers.