Hi, I purchased this phone one month+ ago and now i'm having some issues with the volume or buttoms. The phone is turning down the volume automatically and when it happens, i cannot use the right side buttoms (power off, volume) until the phone get back to normal status again. When this happens and Im turning up the volume to fix it, is still turning down forever until it's in silent mode. I rebooted many times to try to fix it but still having this problem Please assist enric