Chosen Solution
I just replaced my lcd screen but signal keep dropping and switching between LTE+ and LTE..
I had the same issue before thru a professional but they fixed it. Am I missing something?
Usually it has something to do with the antenna ribbon cables not being seated in fully on both sides of the connections. There are usually two on the bottom left of the board and two on the charging port daughterboard starting from the Samsung Galaxy S5 and up.
