■ What should you do if you can only get a 3G line?

Even if your plan supports LTE and 4G, you may still be connected to a 3G connection. In this case, please check the following items. 

*Please check the line type of the plan you are using in the app. 

1. Check if you are in an area with a 4G signal In rural areas, such as mountains and seas, and in urban areas, such as in buildings and underground, the 4G signal may not be available and you may only be able to connect to a 3G line. 

　Please move to a new location and check if the 4G signal is available. 

2. Switch Airplane mode on/off Switching communication off and on again may improve communication. 

　Tap the Airplane icon in the Control Centre to switch it on and off.

3. Restart the device Temporary problems with the device may be resolved by restarting the iPhone. 

　Please try restarting the device. 

4. Check if the line is not specified in the network settings 　

　1. Open the 'Settings' application 　

　2. Select 'Cellular' 　

　3. Select the eSIM installed this time 　

　4. Select 'Voice and data'