AT&T Website | AT&T Coverage Map

AT&T is the second-largest carrier in the U.S., having over 100 million wireless subscribers. It is run as a subsidiary of the larger company AT&T, which also operates wireline internet, TV and phone services across the country as well. First gaining massive customer market share after being the exclusive carrier for the iPhone for multiple generations, AT&T has since branched out to being one of the biggest carriers for supporting Android devices. Though it wasn't the first to do so, AT&T quickly launched and expanded its LTE network after Verizon and now covers a vast majority of the country with its LTE service.

AT&T operates its network with GSM and LTE technology for both voice and data, primarily on 700, 850, 1700 and 1900MHz spectrum. In early 2014, AT&T also announced VoLTE (Voice Over LTE) service and compatible devices, though it will be some time before it becomes a mainstream service.

In what would have been one of the biggest shake-ups to the wireless industry in history, AT&T attempted to purchase fourth-place competitor T-Mobile for $39 billion in 2011. The deal eventually fell through due to regulatory disapproval, requiring AT&T to pay a breakup fee to T-Mobile north of $4 billion in cash and spectrum holdings. Since then, AT&T scooped up what was left of Alltel for $780 million in early 2013. It also casually acquired Leap Wireless (which operated the Cricket carrier) for $1.3 billion in mid-2013, bringing in spectrum and roughly five million customers to the carrier. In a huge deal that could have mobile implications in the future, AT&T acquired DirecTV for a whopping $48.5 billion.

AT&T has some of the highest wireless prices in the business, often pricing its plans almost comically identical to Verizon. With a big push towards so-called "Mobile Share" plans throughout 2013, AT&T hopes to increase the number of connected devices — phones, tablets and hotspots — per account all using the same data bucket. It has also started to expand further into the lower-cost and prepaid arena, however, with the improvement of its GoPhone prepaid brand and recently-renamed Cricket Wireless value-based carrier subsidiary.

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Latest And Best Prime Day Deals

The Ring Alarm security system is reaching new low prices for Prime Day
Ring Alarm home security systems

Various configurations of the Ring Alarm are discounted to their best prices yet exclusively for Prime members at Amazon through Tuesday night to help keep your home secure.

The Sonos Beam Prime Day deal includes a $40 discount and 2 $50 Amazon gift cards
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That's just so much savings in one deal. You'll have to wait for the physical gift cards, but that's basically $100 to spend however you want.

Prime Day dropped this PlayStation 4 console bundle to just $250
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This deal on the PlayStation 4 Slim console saves you $50 off its regular price while also including Marvel's Spider-Man and Horizon Zero Dawn Complete Edition for free. You'll just need an Amazon Prime membership to snag it.

The newest device in the Echo family, the Show 5, is now down to just $50
Echo Show 5
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It's only been on the market since May, but it hasn't escaped the Prime Day price cuts.

Amp up your home security with these huge Prime Day discount on nearly all Ring products
Save on Ring products today only

Whether you need a video doorbell, whole home alarm system, or some lights to brighten a dark area, Amazon has it all marked down today!

These huge price drops on the entire Galaxy S10 lineup might be one of the best Prime Day phone deals we'll see
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We love the Galaxy S10, and we love deals. This combines two of our true loves in one!

Scour Amazon Warehouse's deals to save an extra 20% on tech and more through Prime Day
Extra 20% off Amazon Warehouse

Amazon Warehouse sells a myriad of items in varying conditions, from refurbished to open-box, used, warehouse-damaged, and more. It's a great place to snag a deal, and now Prime members can save an extra 20% off select items at checkout.

There's never been a better deal on the Ring Video Doorbell 2 than this pre-Prime Day offer
Ring Video Doorbell 2 (Certified Refurbished)
$89.99 $169.99 Save $80

Amazon is taking $80 off the certified refurbished Ring Video Doorbell 2, which lets you see and speak with visitors at your front door no matter where you are in the world.

More Prime Day Deals