It’s happening because whenever the signal quality decreases , your phone searches for an Alternative, with a better quality. Then let it be a 3G connection. So, You need to go to settings>mobile network>and swich from Auto(LTE/3G/2G) to LTE.
It’s happening because whenever the signal quality decreases , your phone searches for an Alternative, with a better quality. Then let it be a 3G connection. So, You need to go to settings>mobile network>and swich from Auto(LTE/3G/2G) to LTE.