If the user views an incoming call with Caller ID blocked, he just need to press the button on the phone that would regularly send it to voice mail. The call intangibly loops through TelTech’s system, then back to the user’s phone, this time with the caller’s number viewed as the Caller ID. The caller observes only ringing during this re routing, which took about six seconds in Wired.com’s test with an iPhone on AT&T.

Southworth says, that the problem is earnestly serious, because domestic violence victims who’ve fled an calumnious relationship often have to remain in contact with their abuser by phone, specifically in situations where the former couple have share custody of their children.

Former hacker, Kevin Mitnick, who alpha-tested the service said that what's really interesting is that they’ve totally taken the privacy out of Caller ID.

TelTech is not new and no stranger to controversy. Its Spoofcard product allows customers send any phone number they desire as their Caller ID. Among other things, the spoofing service has been used by thieves to access stolen credit cards, by hackers to avail celebrities voice mail boxes, and by telephone hoaxers to stage a dangerous prank called "swatting," in which they spoof an enemy’s phone number while calling the police with a lame hostage situation. The aim of swatting which is realized in hundreds of cases around the country is to send armed cops into the victim’s home.

Cohen’s company has collaborated in law enforcement searches of Spoofcard abuse, which have led to many prosecutions and convictions. Despite the fact of spoofing-linked crimes, he insisted that most Spoofcard users are just privacy-conscious consumers, including celebrities, government officials, private investigators and even spousal abuse victims and shelters. He also anticipate his new business will be better for that the only way to block your number after it is released is to use Spoofcard.