You may need to check your volume under settings to be sure the sound hasn't been muted.
To fix an iPhone 4 with no sound, simply reset the phone, reboot, or jail break it if all fails, because the problem is software-based.
no
You get a new phone.
take it to a phone fixing store
Most of the time the phone company you have the phone through offers a service that fixes your phone. If not nokia has a website and can send you a an address in which to fix your broken phone.
get a new phone
Try taking it to a phone shop, and tell them that you have network problems, but i doubt you can fix it at home :-)
fix the vent fix the vent
fix it.
tell the phone company and they will fix it
Phone, phono phon all = sound/voice
Take it were you got it from and they will replace it or THEY WILL TRY AND FIX IT IF IT IS FIXABLE