DASH_ERR04: The account number in the target address is invalid. I am
unable to download my bill and get the error message above. I see this
is a old issue which obvioulsy has not been fully resolved. The
solutions proposed by the O2 Community are no...
I have a SIM only Pay Monthly contract with O2 and I'd like to buy a new
phone from someone online. Their phone is an upgrade and is locked with
O2. Will I be able to use the new phone with my O2 chip?