As i am self employed, i needed a business line. I plan to get a second business line with my existing T-Mobile one. However, as a tempory measure, i got one of the free O2 SIM's that they give away from time to time for use in an spare handset i had.
When i got it i put £10 on it. I have been using a massive amount (hours and hours of calls) over the last 2-3 months, but my credit has never gone down. Not a penny
So whats the worst that could happen? Could they try and bill me for the uncharged time? (maybe I should i sell it on ebay!) Anyone else ever had this happen, or heard of it?