Our house move is nearly upon us and the telecom line has yet to be installed. Rather than panic, I set up a wireless network backed by a 4G mobile/cellular data connection.
The resulting connection is enough to work with but I still look forward to having a physical line. The laws of physics mean a physical connection will always outpace a wireless one.
By chance I had a spare TP-Link TL-MR3420 bought for family but later no longer required. This surprisingly inexpensive box did exactly what I needed and with almost no fiddly set-up.
If you are looking for a fast, simple to connect solution, buy the TP-Link TL-MR3420 or whatever is the latest model. The low price of the TP-Link box is because you will need a separate USB 3G or 4G mobile stick. The USB stick is plugged into the TP-Link box and the box shares the mobile connection through a wireless network.
This means one mobile connection is shared across all the devices you have.
TP-Link TL-MR3420 + USB 4G modem = Easy Wireless Network
Want a more capable but more complex set up experience? Consider a RouterBOARD.