Installing An Update; Factory Reset - HTC One M8 User Manual

118 Update and reset

Installing an update

When you see the notification about an available software update, you can update
your phone right away. Or you can dismiss the notification and update some other
time. Your phone will remind you again in a few days.
Have you prepared your phone for the update? If you haven't, please see
for a software update
Correcting the date and time
If you're having trouble installing a software update, your phone may not have been
set with the correct date and time. In most cases, the date and time is set
automatically. But if it's not, you can set it manually.
1. Swipe down from the top edge of the screen with one finger.
2. Tap All settings > date+time.
3. Turn off Set date and time automatically.
4. Set the correct time zone, date, and time.

Factory reset

A factory reset is not a step to be taken lightly. It'll remove your primary Microsoft
account and you may lose data if it has not been synced. Be sure to back up any data
and files you want to keep before you do a factory reset.
A factory reset may not permanently erase all data from your phone, including
personal information, which may be recoverable by others.
Performing a factory reset via settings
The most convenient way to do a factory reset is via the settings.
1. Swipe down from the top edge of the screen with one finger.
2. Tap All settings > about.
3. Tap reset your phone, and then tap yes.
on page 117 on what you should check and prepare.
Preparing