SIM GUIDES
668 or 667 not working: practical checks
Troubleshoot failed 668 or 667 SIM check messages without repeated paid attempts or sharing your CNIC with an unofficial service.
On this page
First check whether the problem affects only the short code or all outgoing messages. A failed SMS can reflect signal, account restrictions, formatting or a service problem. It does not by itself prove your SIM is blocked or misused.
Check these in order
- Make sure airplane mode is off and the phone has service.
- Select the correct sending line on a dual SIM phone.
- Try an ordinary SMS to a trusted contact.
- Check your available balance and short-code messaging access with the operator.
- Review the message format in our 667 and 668 guide.
- Wait before retrying. Repeated attempts may incur charges.
If you are abroad
Short-code SMS may behave differently while roaming. Ask your home operator whether the service is supported from your current network. For your registered SIM count, the web checking route may be more practical.
If the web check also fails
Refresh an expired verification challenge, check that the address is correct and try a normal browser window. Do not install a browser extension or APK advertised as a required “SIM checker”. Avoid entering your identity into lookalike websites.
What to tell support
Provide the time, short code, error wording and whether ordinary SMS works. Send personal details only through the operator’s verified channel. A screenshot should hide unrelated messages and identity information.