iPhone help (can't hear anyone)

[JUMPURS]

My iphone today has started to do something wierd, i can't hear anyone on the phone.

Any ideas? Last night the sound for my ringer etc was coming through the earphone you would hear someone on a call with. but i sorted that, and it was working this morning, but not any more?

Any ideas?

 

[JUMPURS]

NEvermind i done a reset and it seemed to clear it.

Strange, i have never had this issue before.