This document is the user manual of HTC phone
This guide walks you through everything you need to know about the HTC M9, from unboxing and powering the phone on to customizing the home screen, installing apps, and using core features like calls, messaging, and media playback.
It also covers connectivity options such as Wi‑Fi, Bluetooth, VPN, and USB tethering, as well as advanced settings for battery optimization, security, and HTC Sense integration.