How to protect no apparent reasons missed calls | Calls & voicemail Support of ‎HTC One‎

How to protect no apparent reasons missed calls | Calls & voicemail Support of ‎HTC One‎

Here is the solution Step 1: Please make sure your ring tone volume is louder enough, and we suggest you to set the ring tone at "Vibrate" mode if you are in a noisy environment. (Slide the Notifications panel open, and then tap Settings on the u...

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