3G mobile operators have little incentive to offer VoIP services as W-CDMA offers the cost and capacity attributes to support fixed-mobile substitution. Wireless VoIP presents fixed operators, MVNOs and VoIP providers with opportunities to disrupt the mobile voice market.
Mobile operators that offer unlimited-use data tariffs are vulnerable to third-party VoIP services carried via 3G data.
VoIP carried on Bluetooth or WLAN could help fixed operators reverse fixed-mobile substitution trends. VoIP could be used to strengthen the business case for BWA technologi