I recently bought a used Thunderbolt and got a SIM card from Verizon just the other day. I put in my new SIM card, phone is activated, blah blah. The phone is currently running android 2.2.1, which I believe is the version the phone shipped with when it originally came out. My question, however, is that when I go into the settings and I check for new software updates, it keeps telling me that no new updates are available. Any ideas on why this is happening? I figured I would have been able to update my phone by now, but I still have had no luck. Can anyone tell me whether it just takes a while when you get a phone and install a new SIM card or something? I just don't understand why I'm not able to update my phone at all. Thanks for any replies!