I used to use PdaNet. I think the pro version is £5 but it's a one time purchase which is a lot better than paying £20 a month. The only problem I've ever had with it was the pro version deactivated for me once but I contacted custom support and they sent me a manual activation key with in a day of contacting them.
It's also worth mentioning that only the usb mode hides your tether useage from your carrier. Using the wireless mode just turns on the regular hot spot for some reason. Oh also it doesn't require root which is nice.
oi m8 germainz is just a n00bz listen to me h3r3 ar3 th3 st3ps::
hope help press and if i lel xdxd fucked up thx