Hi Gideeuup,
To my knowledge, those Device Events are not publicly documented. Nethertheless, "Device Attribute Device MCC Modified" as far as I remember is triggered when:
- SIM card is changed or removed from device
- Any network changes like roaming device
If think "Device Attribute Phone Number Modified" is also linked to SIM card change and "Device Operating System Changed" means the OS is updated but this could also be triggered when applying some compliance policy with OS version.
// if you think this helps, please mark as helpful or correct , thx ! \\
vDruid