Mobile To Mobile
THe billing from other carriers network usage are not indicated and able to be billed as m-m
that is the same with other national carriers. if you are a verizon customer roaming on a us cell, alltel tower you do not recieve m-m
it is just how it works. Sorry
dont worry m-m is about to be a feature of the past since trends are leaning towards unlimited and other packages. ^The need for m-m will go down even more over the next 5 years.