Mobile

A hand holds a black smartphone against a dark background. Above the device hovers a red warning symbol in the shape of a glowing triangle with an exclamation mark. The image represents a security warning or potential risk associated with smartphones.

Several Providers Affected German Mobile Networks Exposed Sensitive Data

Sensitive smartphone data could be exposed during calls on German mobile networks. Telekom, O2, and Vodafone have responded.

An unusual audio glitch is affecting several generations of Pixel phones, currently causing uncertainty.

Exercise Caution Don't Speak Until the Other Person Picks Up!

Researchers report an effect in mobile networks that may allow recipients to hear voices before the call officially begins.

Amazon Reveals Initial Technical Details for Satellite Project Leo

New Satellite Network Calling Anywhere? Amazon Plans Satellite-Based Mobile Network

Amazon Leo to Connect Smartphones via Satellite and Close Coverage Gaps The launch of the new network is planned for 2028.

What Users Need to Pay Attention To Vodafone Revamps Its Mobile Plans

New Vodafone Mobile Plans Starting July 2026: An Overview of Changes in Data Volume, Travel Options, and Popular Plan Extras

Vodafone Analysis Why You Shouldn't Use Your Phone on Wednesdays!

According to Vodafone, spam calls are particularly frequent on Wednesdays. Here's why the risk increases and how to protect yourself.

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.

Mobile Communications Pioneer What Actually Happened to Mannesmann?

Mannesmann launched the D2 network in 1992 as a mobile communications pioneer in Germany. The beginning of a new era in communication.

In 1990, cell phones were still quite bulky

Review The Beginnings of Mobile Communications - How the World of Cell Phones Came About

Gain an insight into an era when mobile networks were just being established in Germany and mobile telephony was still in its infancy.

New Year's Greetings Network Overload on New Year's Eve? Here's How to Send Messages Anyway

If the network is overloaded on New Year's Eve, New Year's wishes won't go through via phone or messenger. But what can you do to ensure they still get delivered?

Starting in 2026, EU rules will also apply to Ukraine and Moldova

New Regions in the Network Roaming Expanded! Where You Can Now Use Your Phone Without Extra Charges

Starting in 2026, roaming charges will be eliminated in Ukraine and Moldova. Travelers will be able to make calls and use the internet there just like in the EU.

It is a ruling with significant implications: The 2019 5G allocation process was unlawful.

The Auction Was Illegal 5G Frequencies Must Be Reauctioned: Impact on Users

The Federal Network Agency must reallocate the 5G frequencies. A court ruled the 2019 allocation invalid. The decision has consequences.

Poor Reception Despite Full Bars? Android Might Be to Blame.

Discovery in the System Code Android Exaggerates Signal Reception—But There's a Reason

A network expert has discovered in the Android system code that the OS reports a higher mobile signal strength than it actually is.

With One UI 8.5 Samsung Simplifies eSIM Transfer from iOS to Android

The eSIM transfer from iOS to Android can currently be complicated. However, it seems that Samsung is working on a solution.

In the U.S. Telekom Sold User Location Data

Deutsche Telekom allegedly sold user location data in the U.S., and the company now faces a million-dollar fine.

Making phone calls while simultaneously sending messages? With RTT, this will soon be standard.

RTT (Real-Time Text) All Phones Are Getting a New Feature! Hardly Anyone Knows About It

Real-Time Text (RTT) allows users to chat and make phone calls simultaneously without needing additional apps on modern smartphones.

Within the EU, many mobile phone plans can be used just like at home. However, some locations pose potential cost traps.

Calling and Surfing Cost Trap Ahead! What to Consider When Using Your Phone on Vacation

The EU roaming regulation aims to prevent cost traps. However, there are pitfalls that travelers should be aware of when using their phones abroad.

Klarna's New Mobile Plan Now Available in the U.S. – Germany to Follow

Surprising Move Klarna Launches Its Own Mobile Plan

Klarna expands its offerings as a financial service provider by launching its own mobile plan in the U.S., which is expected to be available in Germany soon.

Vodafone has launched new options for travelers

Travel eSIM Vodafone Launches Global Data Option–But a Cost Trap Looms

With the new Travel eSIM, Vodafone offers travelers a global data option that can be used directly without changing SIM cards.

6G, the successor to 5G, is set to launch in Europe in 2030.

Successor to 5G What the Next Generation of Mobile Networks, 6G, Will Bring

6G, the successor to 5G, is on the horizon. The introduction of this new mobile technology in Europe is expected around 2030.

Project by Nokia Why the Moon is Now Getting a Mobile Network

Nokia is to bring mobile communications to the moon. This is part of NASA's Artemis mission, which will soon take people back to the moon.

The pre-notified termination of a contract is not final. Customers can quickly fall into the trap.

Attention: No termination! What does notice of termination mean for mobile phone contracts?

A notice of termination has nothing to do with the termination of a cell phone or Internet contract. It is rather the opposite

5G, 4G, LTE—or maybe even EDGE? What the abbreviations mean

Smartphone Status Bar What LTE, 5G, and HSDPA+ Reveal About Mobile Internet

TECHBOOK explains what letter combinations like 5G, LTE, or HSDPA+ in the smartphone status bar reveal about mobile internet.

Almost everyone uses a cell phone. But how does the mobile network behind it actually work?

Simply Explained How Does a Mobile Network Actually Work?

Activate mobile data and start surfing–thanks to the mobile network, this is possible even in the most remote corners of Germany. But how does it work?

Fraud in the Name of DHL, Netflix and Others How to Identify Scam Text Messages

Fraudulent text messages are frequently sent in the name of companies like Netflix, DHL, and various banks. TECHBOOK explains how to identify them.

O2, Vodafone, and Deutsche Telekom are the major players in Germany's telecommunications market. They have been investing heavily in expanding their 5G networks to meet the growing demand for faster and more reliable mobile internet. This expansion is part of a broader effort to enhance digital infrastructure across the country, which is seen as crucial for economic growth and competitiveness. The companies are also focusing on improving customer service and offering more flexible plans to attract and retain subscribers. Potential Class Action Looms Against Mobile Carrier

Mobile network providers face a class-action lawsuit for allegedly illegally sharing contract data with Schufa, a German credit bureau.

Telekom Enhances Prepaid Plans: Users Now Get More for Their Money

Starting September 20 Telekom Adjusts Mobile Plans: What Changes for Customers

Telekom is updating its MagentaMobil Prepaid plans, increasing the data volume. The smallest plan is receiving an even greater upgrade.

Market Analysis Shows Calls from landlines to cellphones can quickly become a costly trap.

Calling a mobile phone from a landline can be expensive, as shown by a market analysis. TECHBOOK explains how you can protect yourself.

Some users with unlimited contracts have received a termination notice from O2.

Unlimited Plans Affected O2 Terminates Cell Phone Contracts for Thousands of Customers: Here's Why

O2 Terminates Unlimited Plans for Thousands of Customers: What's Behind the Decision?

O2 has updated its prepaid plans. Now, 5G is also available.

Mobile Communications O2 Updates Prepaid Plans–Here's What Customers Get Extra

O2 prepaid customers previously had to forgo 5G access. However, the provider is now opening the network to them. TECHBOOK has the details.

On current iPhones, VoLTE is enabled by default.

Voice over LTE What Is VoLTE for Mobile Phones and How Do You Use It?

The abbreviation VoLTE stands for Voice over LTE, which means voice over the fourth generation of mobile networks (4G). But why is there a standard for this?