Recently I bought a Lumia 820. But my 3G or 2G data connection doesn't work. But there is interesting 2 situations:
1) My data connection works on my old cell phone with the same SIM card.
2) I tried my friends' SIM cards on my new phone and their data connection work perfectly.
So I don't have much clue what is going on. One possibility that comes to my mind is my SIM card's age. It is very very old, like ten or more years. So it might be version 1 sim card. Maybe Lumia 820 is incompatible with version 1 SIM cards?
Does anyone have any idea what might be the problem?
2013-02-03 20:31 - edited 2013-02-03 20:32
You have to manually define an APN, aka Access Point, if it's not automatically detected from your SIM. And you may want to try an app from Nokia, called APN, which adds an "APN" option in your settings menu and enhances your APN detection and configuration. I hope it helps.