Of course the Apple store is your choice. A hour is not too far, my nearest apple store is 3000 miles away but I went to there. 3 times.
You will be replaced for sure. But aware of the following on replaced one:
- buzzing vibro, before setting up move the silent switch placing the iPhone to ear tightly. It must be vibration without any sound.
- OCNA. Activate the one there and make 5-10 calls to different numbers. Pay attention on very first call, if counter will start but no sound, replace it.