I'm having problems with my Internet connection.

我的互联网连接有问题。

Almost everything you can do on the device requires an Internet connection.

你在这套设备上可做的几乎每件事都需要连接因特网。

Internet connection (broadband preferred).

互联网连接(最好是宽带)。

Internet connection, with broadband being preferred.

互联网连接(最好是宽带)。

All you need is an Internet connection and a headset!

所有您所做的只要可以上网和一副耳机！