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from www.tmz.com -Here’s a switch. Porn giant Vivid Entertainment claims it’s been violated … by a phone. Ouch.

Vivid has fired off a cease and desist letter to HTC America, claiming the mobile phone maker’s newest model — Vivid — infringes on its trademark.

Lawyers for Vivid … the company that gave us the Kim Kardashian and Paris Hilton sex tapes … claim consumers might get confused and think Vivid is behind the phone … not in a sexual way, of course.

The letter threatens that if HTC doesn’t change the name of the phone by Monday, they’re headed to court.

Come to think of it … a Vivid Entertainment phone would be awesome. Think of the screensaver.

We’ve reached out to HTC’s reps … so far, no comment.