原帖由： mac911nc ,
iPhone 4 CDMA Verizon here. Just replaced the screen and it did not stop searching for cellular signal even after trying date/time, reset network settings, or a hard restart (holding home + power button until it restarts and Apple logo appears release buttons). BUT, after erasing all content & settings it did work! FYI - I had a problem with a previous iPhone 4 where it wouldn't connect to cellular and I removed the bottom speaker and cleaned the gold contacts on the charge port & speaker (oil from fingers caused the interference).