An option called "Live Voicemail" on iPhones with iOS 17 or later may affect your Pre-paid transactions. The VMs are actually on the phone itself and not Rogers' system. If you have a plan that charges by the minute, like my Grandfathered "Anytime" plan, you may encounter charges even if you have (Rogers) voicemail turned off. See the link below in the thread on Live VM.
On the other hand, if you like Live VM, you may want this feature. Make sure you understand how it works as discussed in the thread link above.