A lot of people get irritated when they can’t activate or use their iPhone without a sim card.

I mean who would be able to bear with the constant popup that says “No SIM Card installed” and “Invalid SIM.”

These warnings or alerts are completely normal, and there is nothing to be worried about. As long as you have a working sim card inserted, then the alerts would automatically disappear.


Some users have reported that they still continue to see the alerts even though their sim card has been put in. If this is the case for some of you, trying out one of the following methods does the fix.

  1. Restart you iPhone
  2. Turn on AirPlane Mode and turn it off
  3. Update your iOS to the latest version
  4. Be sure the sim card is activated though your carrier

Some people use an old iPhone or a spare one as an iPod touch instead. However, they usually will be annoyed by the warning that says ‘No SIM Card Installed’ like I mention earlier.

If you want to resolve this issue, there is a jailbreak tweak called CoySIM that could help getting rid of the popup about the SIM card not being installed on your iPhone.

How to Disable No Sim Card Warning on iPhone

CoySIM is now available as a free tweak in your Cydia’s BigBoss repository. After the installation is completed, this tweak will give you several options. One of these will be to disable the “No SIM Card Installed” alerts across your iOS device.

Another useful function is to replace/change the “No SIM” from the status bar to “No Service”.


Additionally, iPhone users can also get a chance to remove their carrier name if they wish to hide it from everyone else.

I think this tweak is pretty neat, especially for people who have a non-working iPhone that they use to browse the web, listen to music, play mobile games, and everything else except for the native phone call feature.

Again, you can download the CoySIM tweak from Cydia, and it’s compatible with both iOS 8 & 9.

  • Ryley

    Hi question, I own two phones (long story). One is an iPhone 5c and is activated through my Boost Mobile number so I can call and text and use my LTE. I have another phone purchased from eBay a iPhone 6s, and it was a sprint phone (my carrier before I switched) and Boost Mobile does not activate 6s’s. so one day I tried to activate it from a sprint phone but it wouldn’t work because it’s a boost mobile number and I was messing with the SIM card, and now it says NO SIM installed. I’m still able to text from my email with wifi but how can I fix it so I’m able to activate it again? I tried everything besides restoring it because it was never activated before, right now it just works as an iPod. I need major help to get rid of the no sim so I am able to activate it in the future. PLEASE HELP.