Chosen Solution
So, the problem is as I mentioned above, I simply can’t hear anything from earpiece receiver, I can only make calls using earphones or the speaker phone. Anybody have ideas about this?
While normally I would encourage self-repair, in this case I would suggest that if the iPhone is still under warranty (and it should be, barring any water damage), you’re probably best off not voiding your warranty by opening up the device just yet. If your device stopped working shortly after receiving it, your best bet is to ask Apple to replace the faulty part - you should not be responsible for fixing it.
I had the same problem, and tried a bunch of procedures suggested over ne internet, such as keep pluging and unpluging the earphone, cleaning the earphone hole, etc. What I did, and worked was go to settings, sounds, and then enable or disable some settings (like tones on keypad or blocking, etc.), then I got back to the original setting, and everything was working fine.
If you are using car kit, get someone to call you while in car, on iphone display select iphone instead of car kit, this will cure problem as it thinks it is still on car speakers. Found this solution and it DOES work.
