If you're seeing no signal bars, it means your device is not properly connected to the network. Here are the common causes and fixes:

1. Check eSIM status: Go to My eSIM and check that the 'Out of bundle Usage' has not been triggered. If this is not the case, then email support@esim.net and let them know this status.

2. Check eSIM is installed and turned ON: Go to Settings > Mobile Services and check that there is an entry for your eSIM and it says 'On' beside it.

3. Network Registration: Try manually selecting a network if automatic network registration doesn’t work. Go to Settings > Network Selection, turn off Automatic, and select a network manually. Wait about 5 minutes for registration to complete.

4. Location and Coverage: Make sure you are in an area with strong signal coverage and a country that is included in your plan. Weak signals, especially in remote or underground locations, can cause service issues.

5. Restart Your Device: Restarting your phone can often help it reconnect to the network.

If you still have no signal bars, then email support@esim.net