I've had the phone for only a few days. Overall, I like it a lot. However, several times now I have lost the data connection. I can still make/receive phone calls, but no web, no email, etc. I have to go into airplane mode, then come out of airplane mode in order to restore data. (Or I need to turn off/on the phone.) Anyone else experience this? Is there something wrong with my phone, or is this normal?