iPhone 6 Case, COMC Extreme Shockproof iPhone 6 Aluminum Case [Metal Hybrid Silicone] Dust/Dirt Proof Military Heavy Duty Protection Cover Waterproof Case for Apple iPhone 6 4.7 Inch (Black)

Possibly mutes my phone, have a new iphone 6 ( ordered through Amazon- seller is cellstore33 ) and have a hard time hearing , even with volume turned up all the way I still have to turn on speaker...Anyone else having this problem?