O2

I have had an auto top up for some time, however It has not been triggered for some time, due to my minimal usage. When exploring myO2, to amend this arrangement, I don't seem to find any details, or in fact any reference to at all (eg card details e...

I need to swap my standard sim for a nano sim. It seems that I can do this by texting a swap request. My question is, when the new sim is available, will my existing tarrif (payg) be preserved, my current balance, plus of course my number. The only d...