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David Cogen

David Cogen

Former Digital Trends Contributor
Author/Co-Author of 46 articles

After always being the person my friends and family came to for help with their tech (see: resident nerd) and realizing how much I loved helping others learn new things about their technology, I started writing tutorials and doing videos on YouTube hoping that it might help others who also needed some guidance.

A brilliant, devious way to stop telemarketing calls once and for all

Few things are more unwelcome than the persistent calling of telemarketers. If asking them to stop hasn't worked, you may need to block them, or even better, trick them into thinking your phone doesn't work. Here's how to stop telemarketers from calling you.
Mobile Guides
iphone speed test 8 keyboard

Four generations of iPhone go head-to-head in our app-launching drag race

The iPhone X may be the latest-and-greatest device from Apple, but does the upgraded processor allow the headset to outpace the iPhone 8 Plus, 7 Plus, or even the iPhone 6S? To find out which device is quicker, we pitted the four smartphones against one another in the ultimate test of speed.
Mobile Guides
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Before you blow $75 on an Apple fast charger, check this trick out

The new fast charger for the iPhone 8 is convenient, but it's also expensive. Can you get similar performance from your old iPad charger?
Mobile Best-ofs
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Our favorite $200 laptop gives you way more than your money’s worth

The impressive HP 14-AN013NR is easily the best laptop under $200, and one that doesn't sacrifice much to achieve its low price point. 
Computing Best Ofs
iPhone charger

Fast charge your iPhone even faster with this helpful trick

Here's a breakdown of how long it takes to fast charge a dead iPhone using three different methods.
Mobile Videos
el modo retrato en iPhone

How to use Portrait Mode on an iPhone 7 Plus, 8 Plus, or X

Learning how to use Portrait Mode on an iPhone 7, 8, or X only takes a moment. Here's everything you need to know about the feature.
Photography Guides
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Gigabit LTE will give your current phone insane speeds. Here’s how it works

Gigabit LTE is a budding new technology, one you should be keeping tabs on. Here's everything you need to know about the new mobile standard.
Mobile News
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Who makes the fastest phone of 2018? We tested the best, side by side

There are hundreds of different smartphones in circulation, but which is the quickest? Here, we compare six contenders to determine the fastest cell phone around.
Mobile Videos
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If Apple Is Slowing Down Your iPhone, Here’s How To Fix It

Wondering if Apple is throttling processor speeds on your iPhone? Here's how to check, and what to do about it if it is the case.
Mobile Guides
Snapdragon 845

Qualcomm’s crazy new Snapdragon chips are a lot more than just faster

At its Snapdragon Technology Summit, Qualcomm unveiled the Snapdragon 845 chip, which could be the foundation for the future of phones.
Mobile Features
iphone x waterproof phones

Is Face ID everything Apple claims? This unscientific test finds out

The iPhone X opts for facial recognition over Touch ID, but is Face ID quicker? Here, we see how each performs in a variety of situations.
Mobile News
Android 8.0 Oreo

Don’t have a Pixel or Nexus? How to get the Oreo Launcher on any Android device

In this video, we show you how to get the Android Oreo Launcher on Android devices that are not Pixel or Nexus phones.
Mobile Guides
Chronos smartwatch — How to make a smartwatch

The Chronos can make any watch smart, including that old fossil on your wrist

Want a smartwatch, but don't necessarily want to shell out the cash? Here's a step-by-step guide to how to make a smartwatch at home.
Computing Guides
iOS 11 review

How to uninstall an iOS beta from your iPhone

Learning how to uninstall an iOS beta from your iPhone is quick and easy. Here, we've put together a brief tutorial on the topic.
Mobile Guides
best rugged smartphone under 300 doogee s60 header

We found a rugged phone cheap enough to batter like you’re supposed to

Rugged smartphones are nifty, but they can also be expensive. Enter the Doogee S60, a rugged smartphone that can be had for as little as $300.
Mobile Best-ofs
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We made three premium laptops duke it out to see which is best for video editing

To find out which dominated the mobile video editing market, the Unlockr took three of the biggest names and put them to the test.
Computing News