Scheduling When To Turn Data Connection Off - HTC One M8 User Manual

Calendar events that have Do not disturb enabled will also be
listed on the Do not disturb schedule screen.

Scheduling when to turn data connection off

To help conserve power and data usage, you can set a time period when
the data connection will automatically turn off during low peak times. This
takes effect after the screen has been off for 15 minutes and there's no
network activity (no downloads, streaming, or data usage).
1. Go to Settings, and then tap Power.
2. Tap Sleep mode.
3. To manually change the settings, clear Learn sleep time
automatically if it's selected.
4. Under Sleep time, choose the start and end time when data
connection is disabled.
5. Tap the Sleep mode On/Off switch to turn it on.
Settings and security 321