a personal hotspot, then perhaps you could just turn it on and off as necessary.
Shut down all unnecessary apps and go from there.
I have an Iphone 5 and use it as a hotspot sometime when necessary. Are there settings on the phone that I can turn on or off so I can get the best bandwidth possible? I'm not trying to use the phone and the internet at the same time, just need a good internet connection.
I'm not very tech savy.