As promised, AT&T has started throttling unlimited plan customers who consume an excessive amount of cellular data.

The No. 3 U.S. carrier is making waves today by announcing plans to begin capping its tethering plans to 5 GB of data per month beginning October 2. This date is interesting since October 4 is when Apple is expected to unveil its new line of iPhones, according to SprintFeed. Coincidence?

AT&T is planning on selling a white iPhone 4S, according to a new listing in its inventory system. Of this is correct, it means Apple will soon release an updated version of its iPhone 4 along with the iPhone 5, according to news first published by Engadget.

U.S. iPhone carriers AT&T and Verizon have unveiled new prepaid plans ahead of the launch of the fifth generation iPhone handset. The two plans, AT&T's "GoPhone" and an unlimited Verizon plan, will be available before the end of the week.

AT&T gets roadblocked on their T-Mobile acquisition. Garmin hits the road with a new app and new price point. Plus it's story time with one viewer created app.

The merger of AT&T and T-Mobile ran into a snag today when the U.S. Department of Justice (DOJ) claimed it would violate U.S. antitrust laws. The DOJ believes it will harm the competitiveness of the wireless industry.

Verizon is now offering select customerss a $20 300 MB data plan. Will AT&T match?

AT&T has done it again. Adding and ending their data and messaging plan options has become a pastime. This is no different.

Remember the days when jailbreaking your device meant some extra money left in your pockets? It seems like those days are coming to an end for hotspot users but we have a solution!

You may have heard that a small percentage of wireless subscribers use up most of the 3G spectrum. These so called "data-hogs" (disclaimer: some of us here are probably proud members of that club) have been the scapegoat of carriers, for all their service issues, and now we're learning their life is about to get even more complicated.

Verizon COO Lowell McAdam has concluded that AT&T’s purchase of T-Mobile will most likely receive governmental approval. As such, the combined company will become the largest wireless provider in the United States, a title Verizon currently enjoys. However, a key U.S. senator says otherwise and will oppose the deal, which still must get Senate approval.

AT&T has reported its second quarter results on Thursday. For the April-June time period, the company’s revenues were $31.5 billion, up 2.2 percent from the same quarter last year. These numbers suggest that despite losing iPhone exclusivity earlier this year, the Dallas, Texas-based company seems to be doing just fine.

AT&T Global Network Client is a new iPhone application, which is currently available to download in the App Store for free.

According to a recent survey carried out by the consumer electronics website Retrevo, over one third of iPhone owners think they already have 4G.

AT&T has recently announced two new modems, which allow users to hook up to the carrier's LTE 4G network.

The Verizon iPhone now accounts for 32 percent of U.S. iPhone 4 traffic, Localytics reports.

AT&T recently announced that its Mobile Insurance program will cover all iPhone handsets from July 17. The program costs $4.99/month, with either a $50 or $125 deductible for each claim made depending on the handset itself.

In the age of smart phone data caps, we cannot be too careful when it comes to monitoring our data usage. The apps in this AppGuide will help you accomplish this task and more no matter where you live or what carrier you are on.

According to a recent study conducted by BTIG Research (registration required), Apple's iPhone is the most popular handset with both AT&T and Verizon.

T-Mobile USA might not carry the iPhone officially, but over one million people are using iPhone handsets with T-Mobile's network. While many of these handsets are reportedly pre-iPhone 4, a T-Mobile spokesperson notes that many Apple fans have "taken the scissors" to their SIM card, and transformed it into a Micro-SIM.

If you're continually experiencing dropped calls on your iPhone, DropCall Eliminator - a new jailbreak tweak - can help.

Yesterday, Apple unveiled iMessages - without telling carriers first.

Another snippet of information seems to have come out of AT&T Mobility CEO Ralph de la Vega's D9 interview. In an article recently published by All Things Digital's Ina Fried, Vega noted that AT&T is "working with the industry" to introduce smaller, thinner SIM cards in smart phones. He added: "I think that probably will happen."