My phone always automatically open the data flow switch, sometimes attached to wifi also so. To set the menu a check, found to be "Andrews system" at cost
You can switch between manual mode and auto mode
If it is abnormal switching and non-misuse of the case can only repair the test
May be turned on automatically switch the mobile data, when the wifi instability will automatically switch to the data flow, the wireless settings will automatically switch off on it, the detailed setting method varies by model.
