Xiaomi Redmi 9A Black

The FM radio function in mobile phones allows you to listen to analog radio broadcasts on very short waves. For most mobile phones, the radio function is only available with headphones connected, as the headphone cable serves as an antenna.

You can connect your phone to external devices via USB-OTG (On-The-Go). Devices such as flash drives, SD card readers, mice, keyboards, game controllers etc.

Fast charging is a technology that allows you to charge your phone more efficiently. Whereas previously the smartphone needed three hours to charge 100%, today less than half the time for the same battery size is just enough.

IPS, or In-Plane Switching, often also known as Super TFT, is a type of LCD display technology. It offers an excellent quality-price ratio, natural colours, low power consumption, and wide viewing angles up to almost 180 degrees.

Micro SD cards are used for storing data on mobile phones, GPS navigation and other portable devices.

Bluetooth is the communication tool used by a huge amount of electronics. Learn how the frequency signal is generated and how it's used. In a simple overview of the different versions, we will show how Bluetooth has evolved and been refined. You can also learn something about the specifications and security of this communication standard.

A device that receives a GPS signal to determine and record a location. GPS modules can be found in car and motorcycle navigation systems, cyclocomputers, sporttesters and GPS locators.

LTE (Long Term Evolution) marks the next generation of mobile data networks. This is an intermediate step between 3G and 4G. Although manufacturers and operators sometimes mistakenly refer to it as 4G, it is not a full 4G network. That's for LTE Advanced. The maximum theoretical data transfer rate is up to 175Mbps for download and up to 57.6Mbps for sending data in one frequency band. 

NanoSIM is the smallest, most advanced type of SIM card.

NanoSIM is the smallest, most advanced type of SIM card.

A digital compass (magnetic sensor) detects the earth's magnetic field to determine the cardinal points. This enables the phone to correctly rotate the map to fit your orientation.

The motion of a gyroscope rotates in space on all three axes. In this case, it determines the direction in which you are moving your phone.

Accelerometers and G-Sensors are motion sensors that determine the tilt in space. The phone uses it to know which way it is being held, e.g. portrait, landscape or upside down.

The vast majority of modern mobile phones are equipped with a proximity sensor. Its task is to evaluate the distance of an object from the sensor. Once the object gets close, the telephone activates a particular function. One of the most common is the function to turn off the screen and the touch layer when the user dials a phone number and places the phone close to his ear.

Android ist ein von Google entwickeltes Betriebssystem, das derzeit von den meisten Handy-Herstellern verwendet wird. Es handelt sich um ein offenes Betriebssystem mit nahezu unbegrenzten Anpassungsmöglichkeiten. Einige Anpassungen können über die Grundeinstellungen vorgenommen werden, während andere jederzeit aus dem Google Play Store heruntergeladen werden können. Der Benutzer kann also nicht nur die grafische Benutzeroberfläche, sondern auch die Bedienung des Handys sehr einfach ändern. Die Schwäche von Android ist dann die höhere Anfälligkeit für Angriffe durch Schadsoftware. Eine ausführlichere Beschreibung der einzelnen Betriebssysteme sowie ihrer Vor- und Nachteile finden Sie in unserem Artikel Vergleich der mobilen Betriebssysteme.

Xiaomi MIUI is an extension of the Android operating system used by phones from the Chinese manufacturer Xiaomi. The environment is characterized by a successful design and also includes a very varied software equipment.