FortiOS Carrier 6.4.9 runs on the 3000, 4000, 5000, and VM64 series FortiGate platforms. For more information about FortiGate VM licensing, see VM License.
To run FortiOS Carrier you must purchase a FortiOS Carrier license from Fortinet. Once you have a license key, you should upgrade your FortiGate device or VM to the FortiOS software version that you want to be running and then use the following command from the FortiOS CLI to license your product for FortiOS Carrier:
execute forticarrier-license <license-key>
The FortiGate restarts and is set to the FortiOS Carrier factory default configuration. You can configure and operate a FortiGate running FortiOS Carrier just like a normal FortiGate. For example, you can upgrade the firmware by downloading and installing a new FortiOS firmware version or through FortiGuard. You do not have to re-license your FortiGate for FortiOS Carrier after installing new FortiOS firmware.