The explanation of common specifications/terms from cell phones, smartphones and tablets can be found in MobileDokan Knowledge Base
Talk-time is the maximum total amount of time for calling after the battery is fully charged. For example, if a phone has let’s say 15 hours of talk-time, that means after fully charging the phone you can talk for 15 hours before the battery is fully drained. 2G talk-time means if you call directly to another phone using the default GSM mobile network. 3G, 4G etc. talk time means if you call via the available mobile internet network.
Lithium Polymer is a little bit advanced type of Lithium-Ion Battery. Charge capacity is nearly the same compared to the Li-Ion and the discharging rate is also similar. The main difference is Its Lighter weight, variety and smaller size and little bit better lifespan of the battery.
Smile Detection or Smile Shutter is an excellent technology in Face Detection enabled cameras which automatically captures the image when someone smiles in front of the camera lens.
i. Digital Image Stabilization: Digital Image Stabilization is the digital way to reduce the shake-effect of the image where particular software and digital camera settings do stabilization.
ii. Optical Image Stabilization (OIS): Optical Image Stabilization is hardware-based image stabilization by adjusting the OIS sensor along the optical. OIS is a real-time compensation so, there is no alterations or image degradation to the image. It works better even if the shutter speed is slower. It is rarely found in smartphone cameras also, an expensive one.
Similarly 720p, 1080p, 2160p have vertically 720, 1080 & 2160 pixels respectively.
Sample resolutions according to the aspect ratios (here, 4:3 & 16:9 only) are given below.
EDR (Enhanced Data Rate) is an advanced function of Bluetooth profile that can transfer data relatively 2/3 times higher than the normal version. For example, Bluetooth 2.1+EDR means it is capable of little bit faster file transfer than regular V-2.1 (only) between two EDR enabled set/device.
LE (Low Energy) is an optional Bluetooth function that consumes less energy compared to regular. It is only applicable when two Bluetooth LE enabled devices are connected.
A-GPS or Assisted GPS is a package of GPS technology which has improved-startup and various performance improvements. Today’s most of the Smartphones are packed with this supporting technology.
GLONASS is a Russian satellite-based navigation system, mainly used by Russian defense is a potential alternative of GPS. It is open for civil use and a lot of smartphones are packed with it. It is more popular because of its precision.
MicroSD card is the smallest in size (not in memory!) in the SD card family. Its size is 15.0×11.0×1.0 mm (0.59×0.43×0.039 in) and weight is around 0.25g. It can be found in a different capacity like 4GB, 32GB, 64GB etc.
Difference between GSM and CDMA: GSM (Group Special Mobile AKA, Global System for Mobile Communications) and CDMA (Code division multiple access) are two types of mobile networking technology under the 2nd Generation Mobile Networking. GSM networks include voice calling, data transferring through GPRS (max 40 to 50 Kbps speed)/EDGE (max around 200 Kbps speed). Similarly, CDMA does. Only the internal processing techniques are different (like multiplexing techniques, Constant & Variable Bandwidths etc…)
UMTS (Universal Mobile Telecommunications System) is the Third Generation (3G) Mobile Telecommunication technology which is improved from GSM technology. It has better speed in data processing than GSM (more than 200 Kbps to few Mbps)
HSDPA (High-Speed Downlink Packet Access) is a powerful third-generation (3G) mobile data communicating process in UMTS & High-Speed Packet Access (HSPA) family. Its downlink speed is up to 42.2 Mbps. Later this is improved to HSPA+ which is nearly 7/8 times powerful in data transferring (up to around 340 Mbps)!
Gyro (Gyroscope Sensor/ 3-Axis Gyro) Sensor is used for reading angular momentum. Though most of the cases the usage of Gyro and Accelerometer in a phone are similar, their working process is quite different. It doesn’t depend on the gravity. It helps to detect rotation, play games etc. It can detect the rotation directly but, can’t find the acceleration in the particular direction.
Proximity Sensor helps to sense nearby object. It turns off the display while talking on the phone holding the phone near to the ear to prevent unwanted touch. Generally found in touchscreen phones.
Compass is used to detect the earth’s magnetic field to find the North-South-East-West direction from your position.
A barometer is used to measure the environmental pressure. In smartphones, this technology helps to update weather information dynamically and help GPS to locate the altitude level.
The temperature sensor is used to determine the environmental temperature and Humidity sensor to determine the current humidity of the surrounding. These sensors help to make weather forecast more precise.
Gesture sensor helps to control your phone by gesture without touching it. It can detect waving hands, arms, eyes faces or head in front of the phone.
Ambient Light Sensor helps to adjust the display brightness according to the surrounding. Like, when you are under bright sunlight. You need a brighter display to see clearly. Then the phone will automatically increase the brightness. Again, you are sitting in a dark place. The screen doesn’t need to be brighter this time. It will now decrease brightness to save energy.
Example: Microsoft Windows, Linux, Apple iOS, Android, Windows Phone OS, Symbian OS etc.
Micro-SIM is smaller than Mini/Standard SIM size (50% of Mini-SIM). Dimension is 0.6”x0.5”. It was first used in Apple’s iPhone 4. Now a day’s lot of the smartphones uses it like, a lot of the Lumia Phones, Galaxy S4, Xperia Z or, Z1, Moto Droid RAZR etc.
Nano SIM is the smallest among three and nearly 40% of Micro SIM’s size (0.5” x 0.3”). Apple’s iPhone 5, 5s, 5c or, Motorola Moto X use Nano SIM.
Dual-SIM, Single Standby – you can insert two SIMs into your phone. But, only one SIM can be active (you can receive or call from one SIM only), another one will remain inactive. SIMs can be switched by phone option. (Don’t need to open set’s back part or replace SIM positions) Like, Sony’s Xperia Tipo Dual.
Dual-SIM, Dual Standby – It is actually what Dual-SIM means. You can run both SIMs at a time. You can make calls or, receive from both SIM. No need to switch or swap position. Majority of Chinese brand/non-brand sets have this functionality.
Written by: Arif Rahman. Email: gardendoggygreen(at)yahoo(dot)com
Edited and published by mobiledokan.com admin