All versions of Visa debit cards, including Visa-issued prepaid cards, bank-issued cards, third-party vendor issued cards and prepaid Visa gift cards can be activated by calling the toll-free number on the back of the card with a cellphone. Most cards can also be activated online with Internet-capable cellphones.
Most bank-issued and third-party Visa debit cards have a unique toll free number on the back; however, in many cases, the call is routed to the Visa cardholder services department that handles customer requests. Many Visa prepaid gift cards come pre-activated, but some require activation after their purchase. Customers can also check their balances and transaction histories and report card problems with a cellphone.