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The Fine Print: Unlimited data plans have limits

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John Mihalkovic of Virginia Beach shows off his newly purchased iPhone 6 Plus outside the new Apple store at Lynnhaven Mall in Virginia Beach

NEW YORK » With cellular-data plans, unlimited doesn’t really mean unlimited. Some carriers threaten to slow down speeds after heavy use or curb how much you can stray from their own networks.

So I wasn’t surprised to learn that the nation’s largest prepaid wireless company, TracFone Wireless, had similar restrictions on its unlimited data plans. TracFone, whose service is sold under such brands as Straight Talk, Net10, Simple Mobile and Telcel America, agreed last week to pay $40 million in refunds. The Federal Trade Commission said TracFone didn’t clearly tell customers about those restrictions.

So how unlimited is your plan? Here’s a look at the fine print of the four biggest carriers.

(Note: This comparison is mainly for traditional contract and other "postpaid" plans. Prices and rules for prepaid plans may differ. Restrictions also don’t apply to Wi-Fi data.)


Technically, most T-Mobile plans are unlimited. But once you hit a certain threshold on its faster, 4G LTE network, T-Mobile will cut your speed to 128 kilobits per second — about twice the speed of dial-up modems, for those who remember them. You’ll get back to the fast lane when the next billing cycle starts.

For truly unlimited data, get the Unlimited 4G LTE package for $80 a month. That includes unlimited voice and text. For family plans, a second unlimited line is $60 and each one after that is $40 per month. T-Mobile says speeds won’t get reduced, but there’s still a catch: You get unlimited data only on T-Mobile’s own network.

Like other carriers, T-Mobile has roaming agreements with rivals, so you might actually be using AT&T’s network, for instance, where T-Mobile lacks coverage. T-Mobile has to pay AT&T in that case, so it limits how much you can roam. Unlimited customers who hit 50 megabytes of U.S. data roaming in a given month — less than seven minutes of streaming video by T-Mobile’s calculations — won’t have data service until they are back on T-Mobile’s network.

Unlike its major rivals, T-Mobile offers free data roaming on some plans when traveling in more than 100 countries. It’s unlimited, but those who spend extended periods out of the country won’t be eligible. Speeds are slow, at about 128 kilobits per second. You need to pay extra for faster speeds abroad.


Sprint offers an unlimited voice, text and data package for $60 a month. On family plans, each additional line is $40. Regardless of whether a plan is unlimited or capped, Sprint may slow down speeds for the heaviest 5 percent of data users when the network is congested. That typically covers those who use 5 gigabytes or more a month, or about seven hours of medium-quality video on Netflix.

On unlimited plans, domestic roaming is capped at 100 megabytes. After that, according to the fine print, "Sprint reserves the right, without notice, to deny, terminate, modify, disconnect or suspend service." Yikes. Sprint said in an email that it will offer warnings and a grace period before any service suspension. International roaming is always charged.


AT&T stopped offering unlimited data plans to new customers in 2010, and Verizon did so in 2012. Existing customers were allowed to keep it. Both companies slow down service for heavy users.

For AT&T customers with 4G LTE phones (which the latest phones typically are) the threshold is 5 gigabytes. After that, speed slows until the next billing cycle. For 3G and non-LTE 4G phones, the threshold is 3 gigabytes. However, speeds are only reduced in areas where there is network congestion. AT&T plans to bring that policy to 4G LTE phones, too, later this year.

Verizon slows its heaviest users — the top 5 percent — when they have a 3G device and are in a congested area. It announced plans to extend that restriction to 4G users last October, but backed down following complaints.

With both companies, the policy that applies depends on the type of phone you have, not the network you’re on.

AT&T and Verizon say they don’t limit roaming in the U.S. Their networks are more extensive than T-Mobile’s or Sprint’s, reducing the need to roam. International roaming always costs extra.


T-Mobile: https://support.t-mobile.com/docs/DOC-3299

Sprint: http://www.sprint.com/networkmanagement


AT&T: http://soc.att.com/1gH7UI6

Verizon: http://www.verizonwireless.com/support/network-optimization

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