BYOD Plans includes everything the All Inclusive Plan except the Dial Tone. You use your own Sip Trunk Provider
Hosting only plans are great for someone who already has a 3CX License and already have SIP Trunks.
All inclusive Hosted Plans refer specifically to the licensing of the 3CX software, Initial installation and configuration, ongoing maintenance, configuration and support as well as 3CX hosting SIP Trunking.
BYOL Plans includes everything the All Inclusive Plan except the 3CX License Key. Perfect for companies that already own a 3CX system and just want to deploy it in the cloud