Caller ID free are just some small details you need to take into consideration when getting a new plan. For me it is corporate plan and state explicitly free caller ID. But then even after the plan expired I called up disturb in the end they offer me another 2 years plan that is exactly the same as my previous corporate plan even though my company has discontinued the working r/s with them.
Conclusion: If they wanna retain existing customers, they will bend rules (within their profit margin) to keep you for another 1 or 2 year
