Is Mobile phones a competitor ?

The article on the Tech Beat talks about how you can pay some of your payments using your mobile phones and things will get reflected in your following telephone bill. As a example the article suggests an donation you pay to a charitable institution.

Subscribers simply need to send a short-text message to a 5-digit short code to donate 25 cents a day for 31 days. That donation will appear on their monthly wireless bill.

Also olga suspects or expects mobiles to do some work that a bank supports

In fact, I think it's quite possible that cell phone companies could, eventually, become banks, keeping customer money, helping users pay bills and to pay for purchases. Check out this story, describing the various financial transactions that wireless service providers already enable in other parts of the world.