updating software on a thunderbolt with no service plan.
I have an HTC thunderbolt and I'm not currently with Verizon. I want to update the software but its not connected right now. I plan on getting the service turned back on when I can afford it but nut sure when. I was hoping someone could tell me how I could do update the software. Its stock and the current software it 2.2.1. Sorry if I left out any pertinent information, I'm new to forums so please excuse me if I don't know the proper etiquette or where to post. Thank you for any info you can help me with.