Ah so I just recently got BB 8330. And I get really bad service. Sometimes I cannot get service at all when other verizon phones or my old (alias 2) phone could. The red arrows are constantly flashing in the top corner. Which I know means data is being sent/recieved. I have all apps closed minus the 5 that are always open. It's causing my battery to drain faster due to it searching for service. My friend had mentioned resetting the OS. I don't know if it is just the phone or if there is something I could do to fix it.
check with your carrier to see if you have the latest update for their towers? If new I would take it down to the carriers store and compare signals or have them check it out.