■Setting Up Network
1.Tap on the Setting button at the top-left.
2.Tap on the [3G] or [Wi-Fi] or [Bluetooth] at the top of the screen.
3.From the list of networks displayed, select the network to connect to.
■Reboot the device.
Please reboot the device by press holding on the Power button for seconds to
power off, and then press hold again to turn it back on.
■If rebooting does not improve the situation, You can check the Mobile Data status is ON or not
1.Tap on the “Menu” button at the top left corner of the screen
2.Tap on " Settings"
3.Tap on "Mobile Data"
4.Turning Mobile Data on