Telephone

Secret Number Leaked Trump's Private Cell Number Circulates in Washington

Trump's private cell phone number is reportedly making the rounds in Washington. Why the direct line to the president is causing a stir.

Man Talks on a Telephone Device Developed by Alexander Graham Bell

Historical Milestone 150 Years of the Telephone: How Bell's Invention Changed Communication

When Alexander Graham Bell registered his telephone on February 14, 1876, no one could have predicted how fundamentally this technology would change the world.

If an unknown person is on the phone, you should be careful what you say

Caution! Fraudsters Are Waiting for You to Say This Word on the Phone

If the phone rings and an unknown number calls, be skeptical. This is because scammers want you to say a certain word over the phone.

Hotline messages are annoying. But using a specific word can get you to a representative faster.

Faster Access to Advisors Bypass Annoying Hotline Messages With Just One Word

When calling a hotline, we often find ourselves stuck on hold. One word can change that and connect you directly with a representative.

A woman looks at her smartphone in her hand while driving.

According to the tax code Smartphone Rings Too Briefly? Here's How to Easily Fix the Problem

The ringtone duration of a smartphone can be easily changed using control codes in the phone app. TECHBOOK explains how it works.

If the mobile network fails, you can make calls over Wi-Fi.

Connection Everywhere Calling Without Cellular Service: How Wi-Fi Calls Work

Wi-Fi calls are practical when mobile networks fail. They offer high call quality, are included in plans at no extra cost, and don't require an additional app.

Experts Offer Tips How to Protect Yourself From AI Phone Scams

Criminals are increasingly using artificial intelligence and emotional pressure for phone scams to obtain money and data.

New UN Report Warning! Why Scammers Might Call You More Often in the Future

Phone scams often originate from scam call centers. According to the UN, these centers are increasingly spreading.

Highly frequented for years Telekom discontinues popular service without replacement

Unused services tend to get scrapped. This now applies to Deutsche Telekom's Directory Assistance, which will cease at the end of 2024.

A lucky cat in Murbach, France - and the last working telephone box in France in the background

Curious The phone booth in France that rings constantly

A phone booth in France actually still works - and rings constantly. TECHBOOK explains why this is the case and how it came about.

In iOS and Android, you can block annoying contacts and phone numbers.

Techbook Basics How to Block Unwanted Contacts on Your Smartphone

Spam calls and messages are unfortunately very common. However, both Android and iOS offer ways to block contacts.

Comeback Do you still have a landline phone?

In fewer and fewer households, smartphones are replacing traditional landlines. However, in home offices, landline telephony is experiencing a revival.