ContribucionesMost RecentMost LikesSolutionsRe: Why are you going to charge $20 a month to pay with a credit card? Oh no poor tmobile being charged a marginally higher % on cc transactions! So they're going to rack my bill up $250 a year because of it. This is a ridiculous policy change. Re: Why are you going to charge $20 a month to pay with a credit card? That's just pedantic. My bill is going to be $20 a month higher if I use a credit card. Taking away a discount IS billing me $20 a month more.