Tesco, Asda and Ikea all do good PAYG deals which are ideal for kids and less than half the price of the bigger names.
The THW will not let me switch her to Asda (less than half the price of Vodaphone for texts and speech calls) in case any of her friends see that she is "uncool". I still refuse to spend more the £10 a month on her top-ups. She wants more let her get a paper round
She could of course have twice the phone use for the tenner if she wasn't so stupid as to think that her friends would see the word ASDA on their screens when she called them.