O2

I have a PAYG sim and number, but only use it infrequently as I live abroad. Nevertheless I need it eg for getting one-time passwords sent through from my bank (they will only accept a UK mobile phone number!). What do I need to do to keep it active,...

I'm trying to make a call to the UK from Malaysia from my Pay as You Go. I've done this before without any problem (apart from the fact its so expensive!) but now every time I dial a number (including 00 44) I get a recorded message saying 'the numbe...