The indispensable cell phone is becoming more vulnerable. Wireless carriers and traditional security 
companies are stepping up efforts to fortify what they say are hackers’ next big targets: the multipurpose cell phones and smartphones consumers keep glued to their hips.
The still-nascent threats are twofold.
Mobile spam an annoying interruption or, more seriously, a new tool for identity thieves is growing more prevalent.
The threat has been underscored by recent scams sometimes known as "SMishing" in which spammers use text messages to trick users into disclosing personal information.
In one recent attack, a message asking recipients to register for an online dating service attempted to sneak a virus onto users’ machines. Businesses scramble to stop cell spam