AT&T has begun shutting down its 2G service in New York to free up spectrum for 3G and 4G customers. The shut down will effect a number of mobile phones that rely on 2G service for voice and data.

If you’re still using an original iPhone that doesn’t support 3G, it isn’t time to worry just yet. At least initially, the AT&T will only be shutting down one of the frequency bands that it uses to provide 2G service. Frequency that is  supported by the original iPhone will be maintained for the foreseeable future.

Sprint took a gamble on the iPhone last fall. In exchange for getting the iPhone 4 and 4S on its network, the company agreed to pay $15 billion in subsidies over the next four years. The company acknowledged that it pays 40% more to subsidize the iPhone than it does for Android, BlackBerry, and Windows Phone handsets. To get shareholders on board, Sprint CEO Dan Hesse actually gave up $3.25 million in compensation.

It looks like Sprint’s investment may be paying off in unexpected. A new study by the Yankee Group revealed this week that the iPhone has a halo effect for carriers as well as it does for other Apple products – an effect that dramatically changed public perception of Sprint once it began carried the iPhone.

Bad news for grandfathered unlimited data subscriber on Verizon: the nation’s largest carrier will kill unlimited data once and for all when subscribers switch over to 4G LTE data plans.

Starting in mid-summer, when you buy a LTE handset and switch over to 4G data, Verizon will make you buy one of its new data share plans. Switching plans will end your grandfathered unlimited plan.

Mobile marketing and advertising firm Velti recently released its April Data report, which includes several interesting and surprising details including AT&T’s lead as U.S. iPhone provider.  The most surprising piece of information in the report, however, is that adoption rates for the new iPad appear to have peaked and slowed.

The federal government along with U.S. wireless providers will be rolling out a new Emergency Text Alert System this month. The service will be free and will provide geographically targeted wireless emergency alerts for life-threatening events such as: tornadoes, flash floods, hurricanes, typhoons, tsunamis, dust storms, extreme winds, blizzards and ice storms. The text alerts will be brief and will inform consumers to seek additional information or immediately seek shelter if necessary. You may have experienced such alerts via third party weather application or private services but this will be the first national service by the federal government and the wireless industry.

Next week, the iPhone will launch on three additional U.S. regional carriers. This move follows last month’s roll out to five regional carriers plus last year’s addition of C Spire and Puerto Rico-based Claro Puerto (Apple’s first deasl with regional carriers).

Apple’s regional expansion prompted Morgan Stanley analyst Katy Huberty to issue a note to investors saying that the new partnerships will help ensure sustained iPhone growth. She also noted that she doesn’t expect to see carriers dropping subsidized pricing for the iPhone – a concern that has also made investors hesitant when it comes to Apple.

Sprint’s plans to migrate its 4G server from its current WiMax standard to the more common LTE already in use by Verizon and AT&T. The move should allow Sprint to offer LTE iPads as well as future LTE iPhones. That’s good new for the carrier and Sprint customers.

Unfortunately, there’s also some bad news. Sprint’s LTE network won’t be able to match the performance of its competitors.

TriggerTrap is another app which works with an accessory cable to remote trigger you DSLR. Compared to other trigger app/cable combos, TriggerTrap distinguishes itself by also triggering the iPhone’s own camera, should you wish, and by its crazy range of triggering modes.

Practically every mobile phone carrier in the U.S. has relied on the iPhone to boost their sales numbers and increase customer satisfaction in recent years (sorry, T-Mobile). It turns out that betting on the iPhone isn’t just great because it gives customers the pretty device they want, but converting users into iPhone owners might mean that they will be more likely to stay with your carrier in the long run even when your service sucks. On the other hand, BlackBerry and Android owners are quicker to jump ship when the service has problems.

We here at Cult of Mac just can’t get enough of Instagram. It’s really hard to not love the little photo sharing app, even after it got bought by Facebook for $1 billion.

Have you ever wondered why images upload so quickly in Instagram? The whole app feels super snappy, and images can seem to upload instantly after you take a picture and apply a filter. What kind of magic is going on in the background?

As it turns out, the app’s design tricks you into believing its working faster than it really is.