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SIM UNREGISTERED

  • February 22, 2026
  • 5 replies
  • 88 views

My Samsung Galaxy suddenly displayed a notification stating that SIM is UNREGISTERED?  Coincidentally, at the same time I noticed this my text message to 2 contacts wouldn't and still haven't sent

Best answer by Dinh

Which phone model was it? And was it purchased from Koodo? 

From your description, there is a chance that the phone was blacklisted. I would recommend you put the SIM into another phone to see if the SIM works normally. If the SIM works, the issue is from the device.

This topic has been closed for replies.

5 replies

  • Author
  • Beginner
  • February 22, 2026

 


Flo Koodo
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  • Official Rep
  • February 22, 2026

Hi ​@Bonnie L 

We have looked into it from our end and the services are active.

Have you tried re-inserting the sim card or trying it on a different device? 


  • Author
  • Beginner
  • February 23, 2026

I've done this and tried everything 


Dinh
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  • Mobile Master
  • Answer
  • February 23, 2026

Which phone model was it? And was it purchased from Koodo? 

From your description, there is a chance that the phone was blacklisted. I would recommend you put the SIM into another phone to see if the SIM works normally. If the SIM works, the issue is from the device.


Forum|alt.badge.img+4
  • Mobile Master
  • February 23, 2026

I've done this and tried everything 

If you tried to put your sim in a confirmed working phone and it still doesn't work, then it sounds like the sim might have failed. In this case you will need a new sim and swap it over.

Did you also check your friend/family's sim in your phone to see if the issue followed the sim or your device?