Pissed off with slow internet speed on your iPhone device?
Just make sure you have 4G enables from your service provider and then follow the steps given in 0.42 seconds video below:
Be rest assured now you’ll not be switched to 2G or 3G network. Your device will run on 4G network.
At times when there is poor connectivity your device automatically switches from 4G to 3G or 2G, but if you use above settings then it will not switch to 2G or 3G. Rather it will keep trying to look for 4G connectivity.
In such case, you may try switching to automatic setting, which shall help you get connected to the internet when 4G connectivity is not available.
Otherwise, mostly 4G connectivity should work fine.