I've had a similar experiences with Envirofone too. I got some decent rewards but there was one time where i had an old Nokia and they told me that they would give me £35 for it. Then i got an email saying thye will only off £12 for it because it had a scratch on the screen. I know myself from a friend who works in the mobile phone industry that they simply replace the screen and it's a s good as new again - somehow i dont think that they screen is worth £23!!!
Anyway, other than that they're ok. Another one that is good which i have tried is www.mopay.co.uk they have some good prices on handsets. I dont really have many handsets around to test them fully but my expereince was positive!
