The freeze up sounds more like either a fault with the unit itself , has it always done it from new
The argument that the freeze up can be caused by signal is not an acceptable one because most people will experience signal glitches for a brief time or longer due to local interference or similar - so any DTT or for that matter sat box must be able to cope with a glitch in the signal and should not freeze due to this - if tech support are suggesting this then this needs to be sorted at there end with a firmware update, I would ask them to have a look at the unit for you if it has had this fault for some time - obviously put in the latest non patched firmware and retest and see if the freezing still occurs, how often does it freeze



