* For making mobile phone calls and use of mobile internet outside Luxembourg your iPhone 4 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 iPhone 4.
* To manually select a different network, click *Next* for instructions.
* Start screen.
* Choose *Settings*, and then *Carrier*.
* Choose the Tango network.
* The iPhone 4 is now requesting access to the selected network.
* Click here for roaming partner networks abroad. These are mobile networks with which Tango has negotiated reduced rates.
* The iPhone 4 now has access to the selected network.
* You can now browse the internet via the chosen network.