iphone problem

[ONESHOTKILL]

i have a iphone 3g had it since end of may 2009,for past month my sound kept going off,and when i used my phone i couldnt hear anyone but they could hear me,after 20 mins or so if i rang out again it was fine.I noticed while playing music through my phone it would say Headset volume instead of Volume,so my phone basicly is keep thinking i have headphones plugged in.I have tryed cleaning the socket and also put headphone jack in and out a few times,but problem still happens,allot more the past week.

Does anyone know what apple's warranty is like,do they do good will gestures and fix for outside warranty ? lol or am i looking to pay £120 or whatever service is?

 

[ONESHOTKILL]

the only thing ive done is update the software,i am sure its a hardware fualt becuase sumtimes if i put headphones in then take them out my sound comes back on but not all the time.If i push a tooth pic in the socket it also works sumtimes