Cards usually come in fixed amounts like $15, $40, $50, $60, or $75. If you need a specific custom amount, you may need to purchase multiple cards.
You can refill your account directly at t-mobile.com . where to buy t mobile prepaid card
Compare (data limits, etc.) to see which card value fits your needs. Cards usually come in fixed amounts like $15,
You can find refill cards at Staples for both in-store and online purchase. where to buy t mobile prepaid card
Sites like Kroger offer digital delivery for various denominations.