can i top-up in any denomination?

Top-up cards are available in specific denominations ($10, $15, $30, $40, and $45), but you can add funds directly to your account in any denomination between $1 and $300 through *PAY (with a credit card), through 800-CRICKET (with a credit card, debit card, or check), and at a Cricket store, Exclusive dealer, or Authorized dealer (with cash, credit or debit card, or check).