New service unmasks blocked telephone calls

TelTech Systems is offering mobile telephone users the power to unmask callers who block their numbers or names from being displayed. The US-based firm launched a TrapCall service this month with an online posting thanking its development team and declaring "Get ready for the site to go ballistic." To use the service, people register mobile telephone numbers at a TrapCall.com website without having to download software to devices. Calls from unidentified sources can then be bounced to TelTech computers, which reveal points of origin.