PiPO V4 - Manual (Page 16)

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during use.
10. Language and keyboard
Set the system language and input method.
11. Date and time
If your network does not support automatic setting of time,
you can set the time, time zone and date manually after
deactivating automatic settings.
12. Telephone info
Here you can view device internal values such as operating system
version, battery status, signal strength of the mobile network etc.