Upgrading to AWS FreePBX AMI v4.x featuring FreePBX v15 is very easy!
Make a proper AMI backup image of your instance via the EC2 Console
Connect to the instance via SSH and run a normal SmartUpgrade routine to ensure your instance is updated to the latest v3.x:
Reboot the instance for any OS level updates to take effect
Now you may perform the in-place upgrade to v4.x. This does not interrupt call services and does not need a reboot when finished:
That's it! This is a GUI level update and does not change asterisk or OS versions in any way. If you experience any issues, feel free to submit a support request via the floating blue button on the right of this page.