Vodafone Mobile Wi-Fi R218
Mac OS High Sierra
1. Find "Network"
Click Main.
Click Mobile Broadband.
Click Network.
2. Select network mode
Click the drop down list below "Current network type:".
Click the required network mode.
There may be different network modes available depending on where you are. If you set your router to the fastest network mode, it will always find the network with the highest data speed and best signal.
Click Save.