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We stored an iPhone in a freezer at -18 degrees Celsius for two weeks. The result is surprising—but trying this at home is not recommended.

A myth in South Korea claims that people die if they leave their fans running overnight.

Did your WhatsApp contact suddenly go silent? These six signs may indicate you've been blocked.

Right on time for Amazon Prime Day 2026, TECHBOOK spoke with Jamil Ghani, vice president of Amazon Prime International.

Many soccer players wear a bra under their jersey. The reason has nothing to do with comfort but with modern data technology.

"The Furious" Hits Theaters as Possibly the Best Action Film of the Year TECHBOOK spoke with Joe Taslim about the filming.

When it's too hot, it's best not to use the Nintendo Switch. The manufacturer itself advises this, citing high temperatures in the summer.

Fritzboxes are considered reliable and fast routers. However, it's not widely known that there is a hidden power mode for increased speed.

Why does the hard drive on a Windows system use the letter C instead of A or 1? The answer dates back to the early days of the computer age.

The horror film "Backrooms" is now hitting theaters in Germany, potentially becoming the biggest cinematic surprise of the year. We discuss whether it's worth watching.

When paying by card, a PIN is required, while a signature is now rarely needed. Here's why and what's behind it.

The rise of the Grundig brand began in the 1950s with the "Heinzelmann" radio. But how is the company faring today?

A simple oversight can allow others to easily read all your WhatsApp chats.

Loot boxes are widespread in video games and are particularly concerning to child protection advocates. But are they actually illegal?

A tool for the small device Flipper Zero can manipulate digital price tags. But why is this even possible?

The internet offers an explanation for every perceived symptom. This fosters a new psychological phenomenon: cyberchondria.

Kagi small web brings back the '90s internet and highlights content often overlooked by Google—how the alternative search engine works.

The Nintendo GameCube relied on affordable hardware and strong games—but that wasn't enough to compete against the PlayStation 2 and Xbox.

Almost every smartphone comes with a pre-installed feature that can help in searching for ticks. Find all the details at TECHBOOK.

Gerhard Wenzel has been collecting historical calculators for nearly 50 years and now owns one of the largest collections in the world.

Personalized Prices Online? Online stores use personal data to adjust prices. This means surveillance pricing can become costly.

Under the name Silvercrest, Lidl has been selling kitchen appliances and electronic items from various manufacturers for decades.

With simple secret codes, you can check if a smartphone is being monitored. Forwarding and spying can then be easily stopped.

A KI expert accidentally discovers a massive vulnerability in vacuum robots, gaining access to 7,000 devices and their data.

Parkside is considered an affordable alternative to Bosch or Makita. But who actually manufactures these tools?

C64 in the West, KC 85 in the East: Why the East German computer couldn't compete technically and economically.

Many believe the lightsaber from Star Wars is a thing of the future. However, Canadian inventors have already built a functional version.

Current System Requirements for WhatsApp on iOS and Android: Check if Your Device Is Still Supported

At Amazon and other online retailers, a practice known as "brushing" can occur. We explain this phenomenon.