I got one of these for my daughter-in-law when I got her a Verizon Wireless PN-215 Prepaid Phone. She couldn't understand why her credit decreased daily, even when she never made a call. There is a 99 cents per day charge whether you use the card or not. So basically . . .what did the $50 buy???I wish we could give a negative number of stars for the rating of this product.