Android is available on many devices and different versions exist in the market. Some of the names and information or settings below may vary depending on the device you have.
Tap on Settings > Wireless & Networks/More… > Mobile Networks > Access Point Names
Once on the APN screen, press the Options button on the device
Tap on New APN
Enter your APN settings
Press the Options button on your device, tap on Save in order to save the APN settings.
Restart the phone and try browsing the Internet.
NOTE: The created APN will show up in the APNs screen after you have saved it. To activate the APN, tap on the radio button located in front of the APN.