No sound My phone rings but when I answer I cant hear anything and when I call someone still no sound.I can hear when I put headphone in its not on headset its on general and volume is on 5

Electronics and water do not mix. You can try to turn the volume up, Turn the ring volume up, Try using it with headphones or wireless headphones, Almost anything can be fixed, but at what cost? If the simple things do not get results, there is probably an internal problem, sound amplifier, speaker, switching, or control.
Most internal problems would near or exceed the cost of replacement, Sorry!

In order to check your mobiles capability to modulate sound just put your headphone. If you are able to hear the speech through headphone then the problem is with your speaker. If unable to get the speech the problem is with main pcb itself and to repair that you will have to go to service center it will be costly but if you are able to hear through headphone then it will be cheap.

Contact your service provider for assistance with this matter please.

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if you had plugged in a headset or headphones to listen to music the phones a little slower and still thinks the headphones are in and if you take the battery out thats one of the things it saves so you still have the problem. For some people they can fix it by simply plugging the headset or headphones back in and taking them out slowly but for others this dosent always work, so what i found out you can do is stick a small pin in the headphone jack and wiggle it around untill you hear somthing ( have your pocket tunes turned on so you'll know when its working) then once you hear sound just quickley pull the pin out.
Hope this helps

best thing to do, so you don't waste your money is buy a brand new phone.it will save you trouble, headaches, time, and money

DO RESTORE UR PHONE IN SETTING OPTION

I'm having the same problem. However, I have discovered that it is something to do with the upper slide part of the phone. For some reason, if you push the slide down just a bit when you're trying to play music the sound comes on. Not sure how to fix this problem other than scrap the phone.

Yea it sounds like the headphone have a sync problem. what you can do i go the Apple store and they should help you out they will swap your headphones and then it should work.
Thank you, Apple Care Technical Support

i guess u have 2 replace your speakers visit a nokia gallery

dear replace the speaker of ur phone in k300 the speaker and ringer are the same if u not have new speaker then short both point of the speaker to gather will be ok.