After many loyal years at '3' being a customer on their 321 PAYG network, I suddenly wondered how my balance was disappearing so quickly recently. I found to my horror that my 321 plan had been stopped, and I had been put on another more expensive one. I always disliked '3' as there was no way of checking where you had spent your balance. I used up virtually all my remaining balance and after reading lots of reviews moved my number to 1p mobile. 1p per min, 1p per text and 1p per Mb data. I am not a heavy user of data, so it suited me fine. The only drawback is that you must top up every 4 months with £10. That is only £2.50 per month, plus your balance never runs out. They were excellent in providing a new sim card, a number to text '3' for a PAC code and found it simple to Port my mobile number over to them.
The added benefit is that you can see online (or mobile) where every penny is spent.
Early days to write a review for 1p mobile, but as they use the EE network, it is more stable than '3' was.
Worth a bash if like me, you don't use the internet much on your mobile. What is there to lose. Should have done this ages ago.