I replaced my TBolt with a refurb one from Asurion It worked great for a week, then it wouldn't hold a 4G signal and the GPS wouldn't lock on to my phone....2 miles away. So, I called Asurion and walked through all the steps (it was rooted, but I UNROOTED it before contacting them). After 30 mins. the rep said they would send me another phone. I asked if they had a brand new NEVER been used one (seeing the TBolt is over a year old, they should have them). She looked and confirmed they did. THey sent me a 100%, brand new, never been used in the TBolt black box phone. I took it to Verizon to have them activate it...even though I could have done it...but, if it didn't work, then I can point fingers at Verizon and not what I did.
1 week with it so far and it is working great.....4G is still an issue at times, but I think that is a nationwide issue and not my phone.
Take away from this: If you are going to get an Asurion phone...ask for a Brand new one.