Chosen Solution

My antenna has slowly gone out on my iPhone 6. It started by going to roam in places where I used to get service, then it just went to searching. Resetting network settings worked a couple times, but only for an hour or so. Replaced SIM, nothing. Had the internal antenna replaced and it worked for a day or two and then went to roam and then searching. I replaced the internal antenna and WiFi antenna and the same thing again, roam and then searching. What could be the cause of my issues? Rear case “actual” antenna issues?

It’s probably not an antenna related problem, iPhone 6 are known to develop this issue especially if they’ve been dropped or got bent. When you get the no service/searching try dialling *#06#, that should give in return the IMEI number..if you get nothing it’s a typical baseband fault that needs a microsoldering repair.