Not receiving the SMS Code can be due to several reasons. We have a detailed article, [How to Improve Your SMS Verification Success Rate on MobileSMS.io](https://mobilesms.io/blog/improve-sms-verification-success-rate/), that explains the common issues and how to troubleshoot them. But in summary, some of the common issues include:
- **Not trying multiple attempts:** Remember, you are only billed if an SMS is received. We recommend trying a few times with numbers from different countries, such as the UK and USA.
- **IP address mismatch:** If you're using a VPN, make sure your VPN's IP address matches the country of the number you're generating.
- **Using flagged IPs and not managing digital fingerprints effectively:** It's crucial to use unique digital fingerprints, especially if you're creating multiple accounts.