Use a high speed connection
Why not make the most of your network connections, and use a 4G connection, when available and if supported by your phone.
On the start screen, swipe left, and tap Settings > mobile network .
Switch Highest connection speed to 4G .
When roaming in an area where 4G might not be available, switch back to 3G . This also helps your battery last longer, as your phone won't try to connect to the 4G network unnecessarily.
You can also select the network manually. Tap Network selection .