Doesn't mention the ability to use credit/debit card to load.
You may value reload your Card Account (i) by transferring money to your Card Account from a “REloadit™ Pack,” issued by Blackhawk Network California, Inc.; (ii) via cash using the Visa ReadyLink network at selected retailers; (iii) via direct deposit from your employer or payer (See “Direct Deposits to Your Card Account,” below; (iv) by using the T-Mobile Visa Prepaid Card app to load money from check(s) made out to you to your Card Account using your mobile device (See “Remote Check Deposit,” below)