Z1603694808821 , via OnePlus 7T , Aug 1, 2021 : While using mobile, suddenly shows no sim card. And no network is detecting. I restarted my mobile, later used sim ejecter and removed the card and reinserted. After that was worked fine. Yesterday suddenly sane thing happened. I replaced the sim from tray 1 to tray 2. Now sim is in 2nd tray. Now works fine. I just, I like to know whether it is sim card issue or with device issue ?