I'm having a problem with my Sanyo 8400. at least i think its the phone. Anyhow, heres whats happening...

when i am talking to someone using my bluetooth headset (doesn't matter who or what carrier) they can hear themselves echoing back. I don't hear anything abnormal on my end of the line but they almost always hear themselves echoing... I just went to a sprint store and had my phone swapped out for a new one, and this one STILL DOES IT!!!

now i know you're probably wondering why didn't i check the Bluetooth headset, well i did. The thing is i tried my headset and my roommates headset and both of them did it. so i thought it was the phone. Has anyone else delt with this before and what did you do to fix it? i'm thinking of buying another headset but i don't want to just throw money at this thing...

well the research i did said this was a great phone... so i doubt that its just a bum of a model... besides, everything else about i like.

and even if i wanted another model, i don't have the cash to get another one. gotta wait for the contract to run out this time...