i too took up the offer when it was first offered,i took two and was so impressed i went for a third,at the time they advised me as i hadnt been with them long enough i wasnt entitled to a third,fair comment.one of the sims was canx after a few months as they allow a 'credit limit' on the phone useage after your 300's are up (i did ask this to be zeroed as it was my 14yr old son who was using it) but was told the lowest they could set the 'credit limit' at was £50,needless to say my lad shafted me so i canx it.i kept the other going as my 11yr old (better behaved) son was doing really well managing his mins/texts.imagine my suprise then when i suffered the same fate (many months down the line,keeping up my payments) as everybody else.perplexed i rang back and asked how come i couldnt have three at the outset but now months after paying for both (then one) i couldnt go back to my original two,i was told the same as the others,i had failed the credit check,i insisted that surely my credit 'score' should have gone up with them not down,to which he put me on hold,5mins later he said he'd had a word with the finance/credit dept and my sim was now being ordered!!! it has since duly arrived and all is fine...you couldnt make it up
