I am in the same boat. My LG G2 screen was cracked and I replaced it successfully. Only thing is that there is no Network. Cannot make calls as no network Signals. Wi-Fi is great, speakers, screen, camera etc all are working fine. I checked antenna cables, connections to the motherboard. Everything is fine. I even ruined my back cover connectors by watching few videos where people inserted some paper behind the copper connections (On the back cover). I do not understand what is the problem. Only thing that is left is to change the whole antenna module but I am not sure that is the problem as it is a sturdy piece held by 5 screws at the bottom. I am stumped... Tried googling the answer but there is no explanation or solution. Please if you find a solution post it every where as people are stumped with this problem...Many thanks. Update: By the way I checked the phone with different sim cards and the problem appears to be with the phone. I am really disappointed as I have voided the warranty now and probably...