Chosen Solution
I replaced the charge port daughter board on my Galaxy S6. Now the 4G doesn’t work. What did I do wrong?
Make sure you haven’t bent the contact prongs on the daughter board and antenna contact points on the rear case. Also the daughter board and the antenna is carrier-specific, make sure you have bought the one for the correct model. The model is written on the ribbon cable connecting to the main board, like SM_G920A for AT&T. Full list here: http://techbeasts.com/list-of-samsung-ga…
