Airplane Mode on the plane and when you land

On the plane

Airplane Mode on, as usual. In-flight Wi-Fi doesn't use your kimsim data.

When you land

1. Switch Airplane Mode off.
2. Make sure the kimsim line is on, with Data Roaming on.
3. Give it up to 2 minutes to find a network.

No bars after that?

Turn Airplane Mode on for 30 seconds, then off. That makes the phone search for networks again. Still nothing? Work through these checks.