Hi boarder42,
does that $20 plan include voice? Do you have an URL of that plan? Do you know how much you pay int taxes and fees?
Reason I ask is that we left T-mo a while ago and switched to RedPocket for $29.99 incl tax+fees for unlimited voice, SMS, 500MB data, plus $2 credit toward international calls. A big plus for us - that's 200 free min to western Europe per month, unused intl. mins even roll over.
When we left that was a steal compared to T-mo pricing. That may have changed.
Thanks!