Why am I not receiving verification codes?
In most cases, the issue is not with the number itself, but with the platform not sending the code, blocking delivery, or triggering risk control based on your environment.
Check UKSIM test messages
If UKSIM test SMS arrives successfully, the number is working correctly.
Verify if the platform actually sends the code
Many platforms silently block sending without showing clear error messages.
Check your environment
Review IP quality, browser setup, device fingerprint, and request behaviour.
Still not working?
Use remote assistance for complex platform restrictions and advanced cases.
1. The platform did not send the code
This is the most common scenario. Platforms often block sending when detecting suspicious activity (IP, device, repeated requests) without notifying you.
2. IP or location triggered risk control
Using VPNs, proxies, or data center IPs may cause platforms to reject sending SMS, even if the number itself is valid.
3. Browser or device environment issues
Platforms may detect browser fingerprinting, cookies, automation patterns, or unusual device switching.
4. Too many repeated requests
Requesting codes multiple times in a short period may trigger cooldown or temporary blocking.
5. Platform restrictions on number ranges
Some platforms apply stricter filters to certain countries, operators, or number ranges. This is beyond UKSIM’s control.
6. How to confirm the number is working?
If UKSIM test messages are received but platform codes are not, the number is functioning correctly and the issue is likely on the platform side.
Recommended troubleshooting steps
- Try a different browser or incognito mode
- Switch to a cleaner or residential IP
- Avoid repeated requests within short timeframes
- Double-check number format
- Wait before retrying
If UKSIM test SMS works
This confirms the number is operational. The issue is most likely due to the platform’s risk control, not the number itself.
Still unable to verify after multiple attempts?
Our remote assistance service can help you complete verification in complex scenarios.