Touchtone Technologies, Inc.
|Touchtone Technologies, Inc. Patent applications|
|Patent application number||Title||Published|
|20080220739||BILLING A COLLECT CALL TO A CELLULAR TELEPHONE - There is provided a method for billing a collect call to a cellular telephone. The method includes (a) obtaining, from a party at a cellular telephone, consent to pay for a call, and (b) sending to the cellular telephone, a text message that contains an invoice for the call.||09-11-2008|