I ave to put iphone on speaker to talk to people cos they CANT HEAR ME wats wrong with my iphone

Bad Speaker? That's what mine did when the speaker was bad. Try Speakerphone, seriously, then update me!

if it were me i would get little ear plug things that u can talk on and have people talk back not on speaker

i put one of those clear screen savers on my phone and didnt notice that it covered that little speaker ...I just trimmed it back a little....I couldnt hear nothing with that covered

Hi there, It sounds like your headset speaker is broken. Take your phone into an Apple store and they should replace it free of charge!
Alex

change the speaker

This sounds like the earpiece has gone, you should be able to hear them if you put it on loud speaker or if you are using bluetooth. However as it is only 5 months old it is covered under warranty so my advice would be to take it back to where you bought it or contact apple direct. They will repair it for you however you will be without a phone for a number of weeks

try turning the volum up and while talking to someone scroll down to the option where it says speaker and select that one

yes. goole "virginize" iphone and restore it to a factory virgin state. DO NOT UPDATE TO FW 1.1.1 make sure you keep it at 1.0.2 or BELOW. Then reunlock using apptapp installer for the jailbreak, PACAY for the activation, download "anySim" from the iphone dev tem page and use iBrickr to install the PXL file to the phone then finally run the anySIM.app o the iphone making sure to disable the auto-locking/standby mode of the phone before running the anysim app. THen EVEN if you get an error RESTART ur Iphone and insert desired sim from tmobile or whatever and restart. should be unlocked and speaker issue resolved.

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.