AS it says, my new 8210, (bought from a car boot sale), cuts out after about 1 minutes talk-time, with a loud continous beep...

It takes a while for it to get back on its feet, then after when it does, it doesnt ringout at all....

Could this have been stolen, or is it a firmware problem...

It also says one 2 one, wether i put in a virgin or t-mobile simcard in it.... Mightnt be relevant but hey....