I have had the Thunderbolt for a week now and pretty much returning it today to get an iPhone 4. I live in an area which is not covered by 4g but 4g is available around 7 miles from my house. When I get home at night and head to bed I am still able to use data service but on a 3g network. When I wake up in the morning I am not able to connect to any data service (I get a message saying no network detected or use Wifi). I check the wireness connection and under Mobile Connection it either says "turning on" or "connection failed". It never changes from this status. The only way I can get my Thunderbolt to connect is by restarting the phone. This is very problem-matic. Today is a cloudy wet day and I have not even been able to get a 3g signal where there is usually 4g service. My blackberry was much better for the internet. Anyone else having these types of 4g to 3g switch problems?