AppleiPhone 7 Plus - iOS 12NetworkUsage across the border
For making mobile phone calls and use of mobile internet outside Luxembourg your Apple iPhone 7 Plus standardly selects the network with the best reception and most attractive tarriffs. This is called roaming.
Therefore, keep the network selection option preferably set to automatically on your Apple iPhone 7 Plus.
To manually select a different network, click Next for instructions.
Go to the Start screen.
Choose Mobile Data.
Choose Mobile Network.
Choose the Tango network.
The Apple iPhone 7 Plus has been logged onto the selected network.