Slow connection? Or your phone stupidly connects to the 3G network when 4G is available, this problem is now solved with this very quick manipulation!
There is no need for any application to take advantage of 4G a little more, a simple manipulation is to be done directly from your phone. The trick is functional without root. I specify first of all that not all phones are compatible with this method, if when you enter the code nothing happens, drop this trick and turn to THIS ONE which works on a lot of other devices.
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The code given in video is as follows, *#*#4636#*#* (if the code does not work: Another trick is available to fix this problem, click ICI to see the video in question) as for changing settings do not change anything, follow the video carefully so as not to generate new problems on your device. I am in no way responsible for any damage you may cause by tinkering with other settings in this menu!
To summarize what this option will do is simply prefer to connect to a 4G antenna if one is available nearby rather than connecting to it in 3G or Edge. It is possible that sometimes your device still connects with another network to the latter, to solve this problem I invite you to follow THIS TUTORIAL in order to force 4G there PERMANENCE.
The result is not an ultra mega booster of death that kills eh, if you do not have a 4G antenna nearby it is not going to invent one, it is therefore normal that this technique will not work everywhere, nor on all phones for that matter. Nevertheless the tip given above allows you to access this setting on phones that do not normally have access to it.