Liquid Crystal Display (LCD)One of the major display technologies used in mobile phones. LCD displays have low energy requirements and are generally easy to read.
LCD panels generally consist of a grid of extremely tiny square areas called "pixels". Each pixel can be controlled to allow light to pass through, block it, or allow just a certain amount of light through. In a full-color LCD, each pixel contains at least three sub-pixels (generally red, green, and blue) that can be individually controlled. At a normal viewing distance, the sub-pixels appear as one pixel, which can be any color in the rainbow.
A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal.
Memory where software resides while it is running, along with the data it is using. Both the OS and application software use RAM.
RAM is a type of memory that is very fast, but is volatile, meaning all information is lost when electric power is removed. For this reason, it is useful only for temporary storage of data that requires fast access.
AMOLED is one of two types of OLED display. The AM (active-matrix) type has a transistor next to each pixel, allowing faster response time. This makes AMOLED suitable for displaying video, and is therefore the most common type of OLED display for a main phone display.
The maximum length of time a wireless phone or communicator is fully charged, turned on and ready to send and receive calls or data transmissions. Standby time is reduced by the amount of time the phone is used for talking because talking on a phone draws more energy from a battery than standby mode.
2nd-generation (2G) refers to the initial group of wireless technology standards that were digital instead of analog (1G).
Digital increased capacity significantly over analog, permitting many more people to use the same base station (tower) at one time.
2G offers both data and voice, but unlike 2.5G or 3G standards, transferring data over a 2G involves a "data call", which uses as much network capacity as any other call, and uses that capacity for the duration of the connection, regardless of whether data is being transmitted at any one moment.
3G Stands for 3rd-generation. Analog cellular phones were the first generation. Digital phones marked the second generation (2G).
3G is loosely defined, but generally includes high data speeds, always-on data access, and greater voice capacity (more simultaneous calls per tower.)
The high data speeds are arguably the most important feature, and certainly the most marketed. They enable such advanced features as live, streaming video.
There are several different 3G technology standards. The most prevalent worldwide is WCDMA (also known as UMTS.) WCDMA is the 3G technology of choice for most carriers that used GSM as their 2G technology.
A wireless mobile radio technology designed to succeed 3G WCDMA/HSDPA/HSUPA (and also CDMA) technology
Its primary feature for users is faster data, although it also improves the efficiency and capacity of wireless networks.
Although "LTE" is not the name of the standard itself, it is often used that way. The actual standard is called 3GPP Release 8 (or greater).
LTE is considered by many to be a "4G" technology, both because it is faster than 3G, and because it uses an "all-IP" architecture where everything (including voice) is handled as data, similar to the Internet.
The first version of LTE to be widely deployed was LTE Category 3. It supports download data rates of up to 100 Mbps.
Newer versions include Category 4 and higher, which add new technologies such as Carrier Aggregation to boost data speeds to 150 Mbps and higher. These newer iterations of LTE include other new technologies to make networks more efficient and robust, as well as support for denser networks to cover denser populations in urban areas.