I have a prepaid account for 10c a minute. With 25 dollars I get 125 minutes, but this should be 250 minutes with 10cents a minute. I checked my phone and my dad's phone, both of them are calculating the rates incorrectly according to our plan. Is this really 20cents a minute? $12.5 dollars should get me 125 minutes not 25 dollars 125 minutes. I am confused. I only just noticed this today, has T-Mobile been over-charging me?