I've been having this issue frequently now especially since the GB update. Every time when the phone comes back from idle state, the 3G is off (no icon on the notification bar). It takes some seconds (30 or 40) to come back on. And that is if I'm lucky! Sometimes it is off for a long time and when I go to settings>battery & data manager>data delivery the data enabled box is "unchecked" and I have to check it to enable 3G again. This is getting really frustating as I stream music in my car from the phone and whenever the phone goes idle it looses 3G and after the song is done playing the next song won't come up b/c data is off. Also big problem with email accts., the gmail account is ok, but my other corporate/school account does not check/refresh b/c data is off when the phone is idle, I have to always turn the phone on (bring it back from idle) wait for data/3G to come back on and then go to the email app and hit refresh for any emails that I had missed. Any fixes or suggestions? Phone is not rooted. Updated to GB.