I'm back with more problems.
Since installing CM10 (the one that was recommended with a tutorial on the last page) there's a few huge issues:
1. Wifi not working... I can find my router and put in the information, it just says connecting, then goes back to saved.
2. Camera not working... Yeah, don't know why, gallery just crashes and it saves a big grey photo.
3. The battery... Yeah I use it quite a bit and have been gaming and browsing, have tried all sorts of apps for managing the brightness and tried that SetCPU thing (hadn't a clue how to use it) but the battery only seems to last like 5 hours which unfortunately isn't good enough for me. Although this was the same situation before I put cm10 on it.
Have searched on the net and as usual completely baffled by the hundreds of threads on xda-developers that seemingly just go unanswered or get answered with a solution that doesn't work.
Any advice?
I can send the phone back before Wednesday and then just cancel my contract with no repercussions, quite tempted at this point in time :/
EDIT: Actually not sure I can send the phone back with cm10 on it, so how can I get back to the way it was whenever I took it out of the box?