Make passwords visible: if marked you may see the letters typed in the password
box.
Unknown sources: allows you to install applications that do not come from
Google Play Store.
12. Language & input
Set language and area, input method etc.
13. Backup & reset
Can backup, restore the machine settings and data
14. Date & time
Set the date, time, time zone and time display format
15. Accessibility
Options for screen rotation, text magnifier, password spelling etc.
16. Developer options
Settings and options for Android developers.
17. About device
Check the machine software version and other information.
1. Insert the SIM card into the dedicate slot.
2. Into the machine "Settings" under a "wireless and network", will be closed
Wifi option, Wifi and 3G are not used in the same time.
Note
Make sure that you turn off the tablet before you insert a SIM card. Also, you
must turn off the tablet before you remove any SIM card.
3G network Settings
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