User level: Level 1 (4 points)Just updated my Iphone 16 to IOS 27.2 from 27 and now randomly my phone says ‘No Sim’ or ‘Sim Error’ and no signal at all. If I shut it down and restart my phone it work perfectly but after that randomly do it again.
Posted on Nov 7, 2026 10:25 PM
User level: Level 10 (454,138 points)Nov 7, 2026 11:20 PM in response to Balazs04
If you see No Service or Searching on your iPhone or iPad
If you see No Service or Searching on your iPhone or iPad ...
Remove your SIM card from the SIM card tray and then put the SIM card back. ... Make sure that the SIM tray closes completely and isn't loose. If you use a SIM tray from a different model iPhone, iPad, or from another phone manufacturer, it might not fit properly.
If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad ...
Learn what to do if you see a SIM not supported alert.
If you see No Service, Searching, or SOS on your iPhone or iPad
If you see No Service, Searching, or SOS on your iPhone or iPad
To be able to use any SIM across the globe you must have "No SIM Restriction" against Network Provider Lock. Please refer to the pic below.
If you see No Service or Searching in the status bar on your iPhone or iPad (Wi-Fi + Cellular), your device isn't connected to a cellular network. If you see SOS or "SOS only" in the status bar, your device can still make emergency calls.
If you see No Service, Searching, or SOS on your iPhone or iPad
User level: Level 10 (454,138 points)Nov 7, 2026 11:21 PM in response to Balazs04
Balazs04 wrote:
Just updated my I....and now randomly
Not every issue an individual encounters on their device can be attributed to an iOS update. iOS 27 or later may have coincided with what you are experiencing, but that does not mean the issue was triggered by iOS. Coincidence in timing is not, by itself, evidence of causation.
If the update itself were the root cause, then every device running that same version of iOS would exhibit the identical problem. In such a scenario, the forums would be flooded with countless posts reporting the same malfunction, creating an unmistakable wave of complaints that no one could possibly overlook.
The absence of such widespread reports strongly indicates that the issue is not a general, system-wide problem with iOS 27 or later, but rather something specific to the individual device, its configuration, installed apps, settings, hardware, or another interacting factor.
In short: iOS 27 or later may be a coincidence in timing, but there is no basis to conclude that iOS itself triggered the problem simply because the issue appeared after the update.
See what each update does: About iOS 27 Updates, About iOS 26 Updates, About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...
Originally posted at discussions.apple.com/thread/256390579