My partner has just taken out a £15/month sim-only deal with O2, that entitles her to 200 minutes + 200 texts. She is worried that this might not be enough and that the charges for excess calls/texts will be punitive. Other than calling up the helpline (202 I believe) to check her usage there doesn't seem to be any other way to check how much of the allowance is left - is that correct?
Also, are there any other things she should be worried about - she likes to worry!