Turn automatic use of mobile data on or off. Press the indicator next to 'Wi-Fi' to turn on the function. Press the indicator to turn on the function. Slide two fingers downwards starting from the top of the screen. If you set your device to use only a WCDMA (3G) or GSM (2G) network, note that it may take several minutes until your device connects to the selected network. To turn automatic use of mobile data on or off, you need to turn on mobile data. Each time the device switches network, connection is disabled. The step described above is the simplest way for users to turn. The steps are the same to turn off mobile data. Toggle right to switch ON mobile data or toggle left to switch OFF mobile data. If the signal strength of the fastest network is unstable, the device may repeatedly switch back and forth between mobile networks. Swipe the top of your home screen downwards. Your device is set to automatically select the fastest network available. Manually set your device to only use either a WCDMA (3G) or GSM (2G) network.
Press the indicator next to 'Use Wi-Fi' to turn on the function. One reason to disable cellular data is that many mobile phone plans charge extra for cellular data access, and many measure how much data you use. When you use your device while moving, you may lose your mobile data connection due to issues with your network provider’s network. Slide two fingers downwards starting from the top of the screen. Why Turn Cellular Data Off Having cellular data available is almost always a good thing, but there are some times when you may want to temporarily turn it off.In areas with poor reception where there may be issues with your network provider's base station, you may lose your mobile data connection and therefore need to move to a different area. Contact your network operator for detailed information. Make sure you have subscribed to use the internet over a mobile network.Connect your device to a charger and try restarting again. Your device may fail to restart if the battery level is low.