My sister is running an old 8100 phone which is still clicking along just fine however recently some really weird stuff happened. She, being stupid, left a 4 dollar balance on the phone bill and they cut off her service. After she paid right away they went to turn it back on and now the phone always says looking for signal. I figured they get the ESN number wrong or something but apparently they say (over the phone with sprint) that everything is correct and all levels of tech support don't know what is going on. Could it be that it needs a firmware upgrade now since sprint and nextel merged? Did they change the network config a lil or something? I'm just lost looking for answers.