Hello. About half a year ago, I regularly encountered the problem of a bad EE signal. But after reading the article about boost https://www.uctel.co.uk/blog/using-signal-boosters-to-fight-ee-signal-problems , I managed to solve this problem. Since here we talked in more detail about the causes of a bad signal and what can be done to help. I recommend that you also read it, as they told where you can turn for help.