After finding out numbers on your name, you can easily deactivate, block or cancel sim by visiting the offices of the respective mobile service provider.
For the cancellation process, you must show your iqama to fulfill your identity verification. After verification, the SIM will be deactivated within a few minutes.
Additionally, you can also block your SIM cards online at the CITC website by following steps stated below:
Steps to cancel sim card in KSA
After finding out an unknown number registered against your Iqama, go at the end of the inquiry page and click on the following link.
Fill the complainant Information carefully.
Fill the information carefully and completely, it’s quite easy.
After filling the Complainant information, you have to attach an image of your Iqama. Attach a copy of your Iqama in the image format.
Add image code
Submitting Application
After submitting an online complaint, the unknown number will be deactivated within five days and you will be informed on your given contact number.
Due to increasing terrorism threats to the kingdom, Saudi Arabia has set the limit on the amount of prepaid SIM cards for the citizens and foreigners. This move will prevent the use of SIM cards to carry out attacks on the kingdom.
I hope now it will easy for you to cancel sim cards on your iqama. I will suggest to do it for all the sim cards which you are not using actively.
Important Advice about use of SIMs in KSA
Expats are now limited to two prepaid SIM cards across all the operators, whereas Saudi citizens can have up to ten SIM cards. These restrictions are applicable to both voice and data lines.
According to a report released by the Saudi Commission and Information Technology Commission, these restrictions are temporarily imposed to eliminate the large number of illegal SIM cards, which are being used in illegal activities against national security.
Telecom companies in Saudi Arabia are going to be affected adversely. They are going to lose a bulk part of the market share.
As some companies have already reported a decline in their sale, as Mobily has its share fall by 0.7 percent, Zain shares fell by 0.5 percent and the biggest operator Saudi Telecom Co has also reported a decline in their revenues.
These restrictions and limitations are affecting Saudi Arabia adversely, the disconnection of unregistered customers and sale pressure has resulted in a huge economic slowdown.
Furthermore, it is expected that the kingdom will see a massive reduction in its Gross Domestic Product growth as only 0.4 percent this year which is much less than the preceding year as 1.4 percent.

I have worked for several years in Saudi Arabia as an expatriate. So I know how dificult it is to manage all the documents and formalities for a common worker in KSA. This is reason I started to write all these articles to help expats in KSA. I hope you enjoy my content.