Sagem MY213X User Manual page 78

How can I increase the efficiency of my phone?
The most efficient actions are as follows:
Please keep your phone safely in order to avoid pressing the keys
unnecessarily: every time a key is pressed the screen lights up.
You can deactivate the screensaver or select the activation time to
be more than every 300 s (the screensaver uses processing power).
Make sure that you don't obstruct the antenna with your fingers when
using the phone (see page 19).
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Troubleshooting