NEW YORK (AP) – The seemingly recession-proof smartphone is suffering from a side effect of the rough economy: Manufacturers simply can't build enough of the gadgets because chip makers that rolled back production last year are now scrambling to play catch-up.

The chip shortage means Apple's rivals are having trouble making enough phones to compete with the iPhone, a problem expected to persist through the holidays. It's also affecting wireless carriers, some of which are seeing delays in improving their networks, and it could even raise computer prices.

Time Warner Cable is dangling some nice incentives to get its subscribers to go to paperless billing.

The nation's second-largest cable operator today announced its PayXpress Go Paperless Sweepstakes. Customers who enroll in paperless billing will automatically be entered for a chance to win numerous prizes, including the grand prize, a 2011 Lexus HS 250H hybrid car.

Apple today said it will close its Quattro Wireless mobile ad network.

According to a post from Apple on Quattro's website this morning, Apple will be deferring to its newly created iAd network.

"We believe iAd is the best mobile ad network in the world, and starting next month, we're going to focus all of our resources on the iAd advertising platform," the posting read.

Comcast plans to bow its 4G mobile broadband service in the Denver area in the first quarter of next year.

The Denver Post cited Comcast executive vice president David Cohen as the source for the timing of the Denver launch. Last month, Comcast announced it was reselling Clearwire's WiMAX service, which Clearwire calls Clear, in 10 additional markets.