- FCC (Federal Communications Commission)
The Federal Communications Commission is a US government agency controlled by Congress. The FCC monitors and regulates interstate and international communications by radio, television, satellite and cable.
The FCC also certifies all mobile phones intended for use in the US, insuring compliance with spectrum allocations, technical standards, and safe radiation levels.
- Feature Phone
A mobile phone that is not smartphone. It has operating system firmware, but third party software support is limited to only Java or BREW applications.
Recently feature phones have begun to offer similar features to those of smartphones, so the main difference between the two groups now is the third-party software support.
A small cellular base station, typically designed for use in residential or small business environments. The benefits of these portable base stations are similar to the ones of using, for example, regular Wi-Fi access points. They allow the expansion of the corporate telephony and intranet network so it can be used by regular mobile phones.
Femtocells are the size of a regular broadband cable router. The small size offers a small area of coverage – in most cases a large-spaced room or two or three separate small rooms.
The femtocell can be easily installed by end users, while cellular towers are only installed by the carrier. .
- Firefox OS
Firefox OS (codenamed Boot to Gecko) is an open-source mobile operating system for smartphones and tablets, developed by Mozilla.
The Firefox OS was announced in July 2012.
Fixed software programs that internally control various electronic devices or individual hardware parts of these devices (such as mobile phones). They involved very basic low-level operations of the device, without which the device would be completely non-functional.
More simple firmwares are usually stored on ROM or OTP/PROM, while more complex firmwares occupy flash memory to allow for updates. Common reasons for updating firmware include fixing bugs or adding features to the device.
Doing so usually involves loading a binary image file provided by the manufacturer into the device, according to a specific procedure. More often than not this is meant to be done by the end user.
The camera focus is set to a specific distance by the manufacturer and can’t be adjusted.
Fixed focus digital cameras limit the photo quality and the minimum shooting distance (no close-ups are possible). The fixed focus technology uses a very small lens with a tiny aperture, thus making all visible subjects in focus no matter their distance from the camera.
Basic mobile phones cameras are usually of the fixed-focus type.
- Flash Memory
Flash memory is non-volatile computer memory that can be electrically erased and reprogrammed. Non-volatile means that no power is needed to maintain the information stored on the chip.
It is a technology that is primarily used in memory cards and USB flash drives as solid state storage and its main purpose is an inexpensive way of storing or transferring data between computers and other digital products. It’s used as primary storage memory on various portable devices due to its low cost, compact size, great physical endurance and low power consumption.
The most popular types of flash memory are NAND and NOR.
- Flight mode
Known also as Airplane mode, this mode disables all radio parts of a mobile phone but leaves other functions available. These include music player, organizer and everything that doesn’t require the radio transmitters.
This mode is required because most airlines forbid the use of wireless devices during flight. Some airlines do not allow the use of such devices even in Airplane mode.
- Flip-down phone
It’s a mobile phone form factor that’s a cross-over between the Bar and Clamshell form factors.
In this case the device is mainly a bar, but a thin “flip” part covers the keypad and/or display when not in use.
- FM Radio
The built-in FM radio tuner is now considered a basic feature. It allows the user to listen to most of the live-broadcasted FM radio stations. Almost all phones with FM radio tuner require a wired headset to be connected to the unit as it’s used as an antenna.
- FM Transmitter
An FM transmitter allows a phone to broadcast music stored in its memory on FM frequencies, so that it can be tuned into a nearby FM receiver such as a a car radio.
FM transmitters are not a common feature on mobile phones, but such modern models do exist. The mobiles transmit at low power so interference with regular FM radio stations is highly likely – especially in dense urban environments where most of the FM spectrum is already populated by live radio broadcasts.
- Form factor
The general look, or size and shape, of a mobile device.
- FOTA (Firmware Over-The-Air)
This is a special feature supported by some phones, where users can update their handset firmware over the carrier network. It removes the need of special cables, computers or third-party programs.
- FPS (Frames Per Second)
This measurement is the video resolution measured in time. 24-30 fps is the normal level for good picture quality. A video with lower framerates appear as “choppy” on screen and fail to capture fast moving objects properly.
- Frame Error Rate
Ratio of data received with errors to total data received. Used to determine the quality of a signal connection. If the FER is too high (too many errors), the connection may be dropped.
Measured in hertz (cycles per second), rate of repetition of changes / waves.
The term frequency is also used for range (band) on the radio frequency spectrum, such as 800 MHz, 900 MHz or 1900 MHz.
- FTP (File Transfer Protocol)
A standard for transferring files over the Internet. Not commonly used on phones, although there is FTP software available for most smartphone platforms.
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