Оригинальный сообщение: Internets ,
While I've never serviced OnePlus One phones, you may have forgotten to plug in the antenna after you replaced the display. It's common to need to fiddle with the antenna connection during screen replacements in most smartphones. [guide|30611|This replacement guide] may be what you have recently performed. CTRL+F the keyword "antenna" and read what a couple of comments have to say about the antenna. Hope this helps!