Chosen Solution
Does anyone experience the same thing with your iPhone, after the IOS update 12.4 signal appears on your iPhone for “No Service” then sometimes the signal appears and disappears again. this problem appeared on July 22 afternoon (which was ios 12.4 released) when my iphone was still iOS 12.3.1 then I tried updating to 12.4 and the problem still appeared. Even though in the morning my iphone was fine. I tried to downgrade, restore etc. signal appears 4 bars and goes down to 1 bar then no service. And if I leave the house the signal appears 1-4 bar (unstable signal) I’ve tried all methods on the internet, nothing works. I will appreciate all the help. thank you
Have you tried restoring in DFU mode?