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The case specifically involves cell tower data for a convicted drug dealer that police obtained from a telecom without a warrant. But the way the ruling is written (.pdf), it would also cover the use of so-called "stingrays" — sophisticated technology law enforcement agencies use to locate and track people in the field without assistance from telecoms. Agencies around the country, including in Florida, have been using the technology to track suspects — sometimes without obtaining a court order, other times deliberately deceiving judges and defendants about their use of the devices to track suspects, telling judges the information came from "confidential" sources rather than disclose their use of stingrays. The new ruling would require them to obtain a warrant or stop using the devices. The American Civil Liberties Union calls the Florida ruling "a resounding defense" of the public's right to privacy.
Crucially, the test was run using the 28GHz radio spectrum band, which ordinarily wouldn't be much good for mobile networks where wide coverage and wall penetration is an important requirement. But Samsung claims it can mitigate at least some of that by harnessing the latest Hybrid Adaptive Array Technology (HAAT), which uses millimeter wave frequency bands to enable the use of higher frequencies over greater distances. Several companies are competing to develop the first 5G technologies, although consumers aren't expected to see related services until 2020 at the earliest.
How well does the phone work? Well, the UI works well enough, but multitasking is rough. Everything's functional, but slow, sometimes taking several seconds to register touch input. The real killer, according to the article, is the on-screen keyboard, which is unbearable. The article concludes, "Sure, we're spoiled, "rich" people compared to the target market, but it's hard to believe that this is a "best attempt" at a cheap smartphone. ... The problem is that Firefox OS just isn't the right choice of operating system for this device—it's trying to do way too much with the limited hardware. It isn't configurable enough." They say the phone doesn't even make sense for a $35 budget.