Jason let me know that the latest Bold OS we told you about, 220.127.116.112 from CSL Hong Kong, gives us back a feature AT&T users have been missing. It lets you toggle the connection between 2G only or 2G/3G. This was available to all when the Bold first launched but was locked for some asinine reason on AT&T Bolds further down the OS line.
Users used to de-brand their phone or set this setting using the Engineering Screen but now you can easily get to it with this upgrade. I am glad RIM finally came to their senses.
As Bla1ze points on on CrackBerry this setting is very important for those who want to save battery life on 2G only. Or if you are in a location with weak 3G you could stop your device from hunting down the weak 3G signal and killing your battery or constantly cutting out.