Verizon's October 16 iPhone Duo announcement says iPhone Handoff will cost $10 per month on compatible iPhones running iOS 27. The carrier describes support as coming soon. Its October 23 in-store date for iPhone Duo should not be turned into a confirmed launch date for the number-sharing feature.
The feature lets a customer switch a single Verizon phone number between two compatible iPhone models. Verizon names iPhone Duo and iPhone 18 Pro as examples and says customers can switch which device is active. That description is different from claiming that two iPhones can use the same number as simultaneously active cellular phones.
MacRumors' October 16 report likewise says a phone number can be active on only one iPhone at a time and attributes the $10 monthly price to Verizon's original announcement. The report describes Verizon adoption as upcoming, not already available to every account or supported by every iPhone.
The $10 figure is the announced monthly price for this feature, not the complete cost of buying two phones and maintaining service. Verizon's broader release includes separate device-payment, plan and promotion terms. Those offers should not be folded into a claim that iPhone Handoff or the additional hardware is free.
This brief concerns Verizon's U.S. announcement. It does not establish another carrier's price, international availability, eligibility for a particular plan or the tax-and-fee total on a customer's bill. Compatibility, rollout and account terms should be checked directly with the carrier before paying for an additional device.
The practical change is a stated price and a coming-soon commitment, rather than a verified activation available today. Buyers should distinguish iPhone Duo hardware availability from iPhone Handoff service availability. The original carrier release and the dated report are linked so readers can check the terms and any later rollout update.