公开(公告)号：US20170171394A1

公开(公告)日：2017-06-15

申请号：US15445601

申请日：2017-02-28

Applicant: TextNow, Inc.

Inventor： Derek TING ,  Jonathan LERNER

IPC: H04M7/00 ,  H04L29/08 ,  H04L29/12 ,  H04W4/14 ,  H04L29/06 ,  H04M15/00

CPC classification number: H04M7/006 ,  H04L61/157 ,  H04L61/1588 ,  H04L65/1006 ,  H04L65/1069 ,  H04L65/1076 ,  H04L67/26 ,  H04M7/0075 ,  H04M15/56 ,  H04M15/60 ,  H04M15/8044 ,  H04M17/02 ,  H04W4/14 ,  H04W84/12

Abstract: A database stores unique associations between account identifiers and mobile-network telephone numbers assigned by a mobile network to mobile communications devices. The account identifiers are also associated with voice-over-IP (VoIP) telephone numbers. Voice calls between the mobile communications devices are made as voice-over-IP (VoIP) calls using respective VoIP telephone numbers. Tracking of the VoIP calls is performed through the mobile network using respective mobile-network telephone numbers, so that a prepaid balance can be enforced.