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Zero Admin, Highly Secure and Easy to Use: 3CX V15.5

Upgrade your existing 3CX licence key to V15.5 today – FREE!

Upgrade for free to the latest version of 3CX. Just fill in the form and your perpetual licence key will be upgraded to a v15.5 annual key for free. There’s no catch; even if your maintenance has expired you still get the upgrade absolutely free. Here are some of the features you’re missing out on:

  • Run on-premise on Windows or Linux or in YOUR cloud

  • Integrated iOS & Android clients – old versions will no longer work

  • Zero admin and bulletproof security

  • A brand new web client with integrated web conferencing

  • Click to Call from any CRM

Note: Please ensure you enter your details correctly otherwise your licence key will not be eligible for upgrade.


Congratulations! You have successfully upgraded your old perpetual license key to a V15.5 annual one. You can now start reaping the benefits of the most easy-to-use and most secure PBX in the market.

You will receive an email shortly with your upgraded licence key information.

Feel free to contact for any further assistance or post any questions you may have on our forum.

Please consent to be contacted by 3CX!