Cherry C8 - Phone Does Not Switch on; Phone Does Not Respond for Several Minutes; The Phone Switches off by Itself

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 For better performance, it is recommended to always fully
charge your battery.
 Avoid storing too much data in the phone as this may affect its
performance.
1) Phone does not switch on
 Press and hold the end key until image appears on the display.
 Check the battery charge level.
 Remove and insert the battery, and switch your phone on again.
2) Phone does not respond for several minutes
 Press and hold the end key.
 Remove and insert the battery, and switch your phone on
again.
3) The phone switches off by itself
 Check if the keypad is locked when left unused.
 Check the battery charge level.
 Check if the “Auto Power Off” feature has been turned on.