TIP

Sometimes it is best to set your 3G BlackBerry Smartphone to 2G (EDGE) only

 whenever you experience network problems and your phone displays full bars,By switching to EDGE only mode and ignoring 3G connectivity, every issue  experienced wld go away and your devices would be back normal (with exceptional battery life I might add on EDGE). Apparently ypu were picking up the town's 3G tower still but were near the limit of its range, which means yoi were ignoring the much closer towers that offered EDGE only.

Long Story Short: If you find your 3G data connectivity appears to be ok but all of a sudden you're experiencing poor battery life, undelivered BBMs, delayed SMS messages and calls dropping, try switching to 2G only. It might save you save from a ton of aggrevation!