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6-1-4. When unrecovered problems occurred, try to
click "Backup & reset" and "Factory data
reset", then follow the instructions. Device
will delete settings and applications after
restart, and restore to factory defaults.
(Please backup all important files before reset.
Otherwise files will be deleted automatically
and restore to factory defaults.)
7. To set date & time and accessibility in "System"
category. To view system version, SIM card
status and other information in "About tablet".
