Can I pay for an iPhone with a Visa prepaid card?

Yes. There should be no issue using a Visa Prepaid card.

Visa Pre-paid cards act as debit cards for the most part, and have been historically accepted.

No harm in trying to add it.

Yes please you can pay either by shopping apple products online on various platforms such as Best Buy.com , Amazon and many more , just create your account and add your visa prepaid cards to it using its required details

Visa Prepaid card is not listed here.

To be sure please call 1-800-MY-APPLE and speak to an Apple Specialist for more information.