Samsung mobile phone g3819d do not use 3g/2g/4g Internet how to do?

First, check the phone is not open the 3g/2g/4g Internet business.

We usually automatically turn on the 2G network, if the use of 3G/4G network is required.

second, I see whether the mobile phone to "move the data" off.

1. Slide the top of the screen with your finger.

2. Then we find the next "move Data" counter it opens (if the WLAN is turned on, please turn off the WLAN).

Third, reset to default values.

1. Also on the phone we found "application".

2. After "Application" we click "Set" to enter, as shown in the figure.

3. Then we'll find "more Settings" in the Open interface.

4. Click on "Mobile network".

5. Select the SIM card you need to surf the Internet (for example, "China Telecom" card) and click on "Access Point name".

6. Click the "Menu" button at the bottom left and choose "Reset to Default".

7. After the completion of the above operation, restart the phone can be.

Well, then almost the Internet, if not yet we have to check whether we have a network, or the title of the network environment is not stable, this we can try to change a place to try to see whether the Internet, because the WLAN network is the home network and 3G/2G/4G network is moved, There's going to be a place where the signal is unstable.