HTC Desire Quick Start Manual page 6

 Quick start guide
4 Replace the back cover
1. Secure and press the bottom part of the back cover first by
aligning into the two openings located at the bottom part of
the back of the phone.
. Press the sides and the top part of the back cover down to
lock the cover into place. You will hear a click when the back
cover is locked in place.
After installing the SIM card and battery, and charging
the battery, you are now ready to turn your phone on for
the first time. Press the POWER button to turn on your
phone.
5 Charge the battery
1. Plug the power adapter
into the USB connector at
the bottom of your phone.
. Plug in the power adapter
to an electrical outlet to
start charging the battery.
It will take about three
hours for the battery to be
fully charged.