Nearly every wireless provider in the United States is intentionally slowing down your data service, detrimentally affecting smartphone apps and video streaming.

That is the conclusion of researchers at Northeastern University, University of Massachusetts — Amherst and Stony Brook University, studying the results of more than 100,000 Wehe app users that have run 719,417 tests in 135 countries verifying net neutrality compliance, before and after the open internet rules were repealed in the U.S. earlier this year.

The raw data collected from the app is used as part of a validated, peer-reviewed method of determining which ISPs are throttling their customers’ connections and what services are being targeted.

Nearly Every Mobile Provider Is Throttling Your Speed, Even on “Unlimited” Plans

The researchers concluded that nearly every wireless provider is throttling at least one streaming video service, some reducing speeds the most for customers on budget priced plans while higher value customers are throttled less. No ISP consistently throttled all online video, setting up an unfair playing field for companies that benefit from not being throttled against those that are. Few customers noticed much difference in the performance of streaming video  after the repeal of net neutrality in the U.S., largely because the wireless companies involved — AT&T, Verizon, T-Mobile, Sprint and others — were already quietly throttling video.

“Our data shows that all of the U.S. Cellular ISPs that throttled after June 11th were already throttling prior to this date,” the researchers wrote. “In short, it appears that U.S. Cellular ISPs were ignoring the [former FCC Chairman Thomas] Wheeler FCC rules pertaining to ‘no throttling’ while those rules were still in effect.”

Summary of Detected Throttling

For each ISP, the researchers included tests only where a user’s set of tests indicated differentiation (speed throttling of specific apps or services) for at least one app and did not detect differentiation for at least one other app. This helps to filter out many false positives. As a result, the number of tests in this table is substantially lower than the total number of tests Wehe users ran. The researchers sorted the Cellular ISPs based on the number of tests from users of each ISP. If they did not detect differentiation, researchers used the entry “Not detected.” The researchers claim that offers enough evidence that throttling is not happening. In some cases researchers do not have enough tests to confirm whether there is throttling, indicated by “No data.” 

The table has two column groups for the results: before the new FCC rules took effect on June 11th, and after. If behavior changed from after June 11th, it is highlighted in bold. 

Sprint’s Skype Throttle

The researchers found that video was not the only service impacted by speed throttles. Sprint (and its subsidiary, prepaid provider Boost), for example, is actively throttling Skype.

“This is interesting because Skype’s telephony service directly competes with the telephony service provided by Sprint,” the researchers wrote. But curiously, the throttle almost entirely impacts Android phone users, while iOS devices have less than a 4% chance of being speed throttled. But isolating the exact trigger for throttling remains elusive, the researchers claim.

“While we have strong evidence of Skype throttling from our users’ tests, we could not reproduce this throttling with a data plan that we purchased from Sprint earlier this year,” the researchers admit. “This is likely because it affects only certain subscription plans, but not the one that we purchased.”

When asked to comment, Sprint said: “Sprint does not single out Skype or any individual content provider in this way.” The test results indicate otherwise, suggest the researchers.

T-Mobile’s “Boosting” Throttle Can Mess Up Streaming Video

Some providers, like T-Mobile, attempt to sell their throttled speeds as pro-consumer. In return for reduced definition video, customers are free to watch more online content over their portable devices without it counting against a data cap. But T-Mobile’s video throttle is unique among providers as it initially allows a short burst of regular speed to buffer the first few seconds of a streamed video before quickly throttling video playback speed. Many video players do not expect to see initial robust speeds quickly and severely throttled. Consumers report video playback is often interrupted, sometimes several times, as the player gradually adapts to the low-speed, throttled connection. Consumers receive lower quality video as a consequence.

T-Mobile Plays Favorites

Through extensive testing, research found throttling begins after a certain number of bytes have been transferred, and it is not based strictly on time; below is a list of the detected byte limits for the “boosted” (i.e., unthrottled video streaming) period.

The impact of T-Mobile’s “boosting” speed throttle. Initial speeds of streaming video reach 25 Mbps before being throttled to a consistent 1.5 Mbps.

More concerning to the researchers is their finding that video apps are treated differently by T-Mobile.

“T-Mobile throttles YouTube without giving it a boosting period, while T-Mobile does not throttle Vimeo at all,” the researchers report. “Such behavior highlights the risks of content-based filtering: there is fundamentally no way to treat all video services the same (because not all video services can be identified), and any additional content-specific policies — such as boosting — can lead to unfair advantages for some providers, and poor network performance for others.”

The team of researchers had just one conclusion after reviewing the available data.

“Net neutrality violations are rampant, and have been since we launched Wehe,” the researchers report. “Further, the implementation of such throttling practices creates an unlevel playing field for video streaming providers while also imposing engineering challenges related to efficiently handling a variety of throttling rates and other behavior like boosting. Last, we find that video streaming is not the only type of application affected, as there is evidence of Skype throttling in our data. Taken together, our findings indicate that the openness and fairness properties that led to the Internet’s success are at risk in the U.S.”

The team “strongly encourages” policymakers to rely on fact-based data to make informed decisions about internet regulations, implying that provider-supplied data about net neutrality policies may not reveal the full impact of speed throttles and other traffic favoritism that is common where net neutrality protections do not exist.

Despite claims satellite broadband has improved, our readers respectfully disagree:

“Most people don’t know what data caps really are until they’ve had satellite based Internet service where the bandwidth is shared,” Scott S. reminds Stop the Cap! He’s a subscriber of Exede, a satellite broadband provider powered by the ViaSat satellite platform serving about 687,000 residential customers nationwide.

Online life can be a lot worse when you are stuck with satellite-based Internet access:

• “I am only allowed to have 10GB per month total for everything and have a 12/3Mbps service. Anything over that and they either cap your flow or give you substantially lower bandwidth speed.
• “You can’t go online with more than three devices (including your phones).
• “You can forget Netflix or watching any shows online.
• “You can forget playing ANY video games online.
• “You can forget taking any college courses online without service interruptions (which I am).”

“And they still charge you as much as other ISPs do (at least $60/month) that provide no data caps and a MUCH faster speed,” Scott writes.

Exede offers most customers plans with 10, 18, or 30GB of usage per month. About one-third of the country, typically the most rural regions in the western U.S., can now choose faster plans at speeds nearing 25Mbps because those spot beams are underutilized. But most subscribers get considerably poorer service because about two-thirds of ViaSat’s residential satellite access beams are full. Despite that, Viasat still managed to find capacity to power in-flight Wi-Fi on JetBlue, Virgin America and some United Airlines aircraft.

Customers who have never had DSL or cable broadband tolerate the slow speeds and low caps better than those that move from an area served by a wired provider. Many of those customers call satellite broadband speed marketing claims “fraudulent” and complain low usage caps make it difficult to impossible to use the Internet to use multimedia content.

Some Clearwire customers remain unhappy when speeds are throttled to “manage” the network.

Clear (formerly known as Clearwire) has announced a general rate increase of about 10 percent for customers using its legacy 4G WiMAX broadband service.

As a result, most customers will pay about $5 more per month for fixed wireless or “on the go” broadband service.

“We instituted this to remain competitive and manage our costs,” a Sprint representative told Broadcasting & Cable. “Like our competitors, we must respond to customer trends, and provide a good user experience, and as a result we will make adjustments to fees and services from time to time. Our offer is still comparable to other offerings in the marketplace.”

Some customers would argue with Sprint’s definition of a “good user experience,” as complaints continue about heavy-handed throttling of Clear’s service that makes high bandwidth applications painful or impossible to use in the evening.

Stop the Cap! reader Akos contacted us this week to complain Clear still advertises and contracts for “unlimited data and top speeds,” while not exactly being upfront about targeting certain traffic for a prime time speed throttle that effectively keeps customers from streaming video.

“They openly admit their service is being throttled by software at each tower site that activates when it detects streaming video services like Netflix, reducing speed from 1.3Mbps to as little as 20kbps, rendering it unusable,” said Akos.

The speed throttle is usually active from 8pm-1:30am daily, when traffic is anticipated to be highest. Clear speaks about its network management speed throttle in the fine print: its Acceptable Use Policy.

Akos complains Clear’s speed throttle makes it easy to blame the streaming service, not Clear itself, because customers running speed tests will not see throttled speeds.

“It fools people to think the problem is on their end or with the streaming service, so customers don’t complain to Clear,” says Akos.

As a result, people using streaming video services get about 30 seconds of uninterrupted video before the throttle kicks in bringing extensive buffering delays.

Clearwire’s Speed Throttle Subject of Lawsuits

Clear’s own 2010 marketing promises unlimited usage with no speed reductions, like those “other” providers.

Clearwire’s speed throttle has been a part of life with the wireless service since 2010. Clearwire had significant legal exposure over its choice of network management because the company routinely advertised “unlimited service” with no speed throttles or overlimit fees. At least three lawsuits were filed against the company for its undisclosed throttling practices, eventually condensed into a single class action case that was finally settled last month.

Under the terms of the settlement, Clear admits no wrongdoing, but will clearly disclose it uses “network management” practices — a term that generally means usage caps and/or speed throttles — and will give customers information about the speeds they can expect when the throttle is active. As of today, Clear has not done that. Clear also volunteered to suspend term contracts and waive early termination fees for customers complaining about speed issues.

At least seven law firms handling the case will split a total award fee of $1,887,792.91 and expenses of $62,207.09. Individual representative plaintiffs each receive up to $2,000. Everyone else identified as part of the class action case that returned a claim form prior to Jan. 3, will receive an average of less than $30:

• a 50% refund of any early termination fee charged after a customer canceled service because of speed throttling;
• a rebate of $14 for customers signing up for Clearwire before Sept. 1, 2010 and experiencing speed throttling or a rebate of at least $7 for Clearwire customers signing up on or after Sept. 1, 2010;
• plus varying amounts for each month of service prior to Feb. 27, 2012 during which Clearwire’s records show it throttled a customer’s Internet speed. Customers throttled at 0.25Mbps will receive $5.00 for each month throttled, 0.60 Mbps: $3.00, and 1.0 Mbps: $2.00.

Court documents reveal of the 2,733,406 customers identified in Clearwire’s records as being speed throttled, only 83,840 submitted timely claims as part of the class action case. This represents a claims rate of about 3.1%. Of those, 76,199 were for speed throttling, 2,331 were requests for reimbursement of early termination fees.

The Future of Clear’s WiMAX and Sprint’s 4G

Sprint purchased the assets of Clearwire Corporation in July, rebranded the network “Clear,” and as of the end of August, stopped selling WiMAX devices to customers. Although Clear will still activate existing equipment, potential new customers are being marketed broadband plans on the Sprint network instead.

Former Clear dealers have received word Sprint plans to eventually decommission its acquired WiMAX network as early as 2014, most likely by gradually converting portions of the 2.5GHz spectrum Clear’s WiMAX service now uses in favor of Sprint’s 4G LTE service in urban and high congestion areas. Clearwire itself was in the process of adopting a variant of 4G LTE technology that would gradually replace the outdated WiMAX standard when Sprint acquired the company.

Although Sprint runs its own 3G network, it partnered with Clearwire to provide 4G WiMAX for Sprint customers. In 2011, Sprint announced it would stop selling devices with built-in support for WiMAX and announced it would launch its own 4G LTE network. Sprint will adopt the same version of LTE other North American carriers are using: FD-LTE, or Frequency Division LTE, which requires one transmit channel and one receive channel. But it will also support and continue Clearwire’s upgrade to TD-LTE, or Time Division LTE, a slightly different standard that supports receiving and transmitting signals on a single frequency at slightly different time intervals, providing enhanced spectrum efficiency. At least 5,500 towers should be active with TD-LTE service by the end of this year. End users will care only to the extent their devices support one or both standards.

Sprint’s 4G LTE rollout will depend primarily on higher frequency spectrum that is disadvantageous indoors and over extended distances. Sprint’s competitors AT&T and Verizon Wireless primarily depend on lower 700MHz frequencies that penetrate buildings better and can serve a larger coverage area. But a combination of Sprint and Clearwire’s spectrum assets give Sprint the most wireless spectrum of any U.S. carrier, which means potentially faster speeds and more capacity.

• 1900MHz: Sprint’s primary 4G FD-LTE service is now available in 151 cities on more than 20,000 cell towers;
• 2500MHz: Now used by Clear’s legacy WiMAX network, will see a transition towards Sprint’s TD-LTE service which will be targeted to urban and high congestion areas from “small cell” sites;
• 800MHz: The former home of now-shuttered Nextel, Sprint will eventually launch FD-LTE service on this band which will offer better indoor and marginal area reception.

Customers can expect devices that support both FD-LTE and TD-LTE in 2014.