External antenna speed boost?

[Elax]

According to Opensignal and a google maps measurement, I'm about 400m from my tower, but with a lot of trees inbetween. My down speed varies between 8 and 10 Mbps on an LTE connection with 3 out of 5 bars on my Huawei router web page I'm roughly 400m from my tower and my down speed is 8-10 Mb/s



Would an external antenna help me boost that?

 

[ProAsm]

400 meters ?
Your router should be melting from the strong signal.
I live 4 k/m from our tower and we live in a green belt with a zillion trees between the tower and here and I never drop below 4 bars.
My download speeds average between 22 and 81 Mbps.
Current test: http://www.speedtest.net/result/7259951705