Here's how to manually set up a data connection on your Nokia Lumia 820:
- From the Start screen, swipe to the left.
- Scroll down to and tap Settings.
- Scroll down to and tap mobile network.
- Tap the add internet apn field.
- Tap the APN field.
- Enter everywhere and tap the Username field.
- Enter eesecure and tap the Back button.
- Tap the Password field.
- Enter secure and tap the save icon.
That's it - the data connection has been manually configured for your Nokia Lumia 820.