This is exactly the opposite of how Bitcoin is supposed to be used. InPay is an additional middle man. T-Mobile customer service/accounting is also a middle man. So this scheme has just increased the expenses and middle men by 100%.
Stupid.
This is how to do it correctly:
Fire all subscriber service employees (both prepaid and contract) of every mobile telephone service on the planet. They are not needed. We only need the towers - not the expensive accounting and marketing departments.
The smartphone talks to the tower to ask for a connection. Instead of the tower asking T-Mobile of the account holder is good, the tower receives a small micro payment from the smartphone directly. Just a smartphone and a tower. No middle man. smartphone pays the tower for connection services - pay per use.
A very small software upgrade on the phone, and a very small software upgrade on the tower - ready to go. No new physics here.
50% of the costs today go to the accounting and middle men. All that is unnecessary when Bitcoin is used properly.
The InPay scheme in the story above ADDS more middlemen. We need to use Bitcoin to REMOVE the middle man!
That is the power of Bitcoin.
I pretty much like your saying , We don't need more middlemen , what we need is trust and bitcoin can be very useful for that , given there can be put a inbuilt escrow