Samsung Galaxy J7 : FEATURES
Sensors : Modern mobile phones come with a variety of sensors that automate or easy many of our daily tasks. This field takes into account the presence of an accelerometer, a gyroscope, a compass, and a barometer.
Accelerometer and gyroscope
Accelerometers in mobile phones are used to detect the orientation of the phone. The gyroscope, or gyro for short, adds an additional dimension to the information supplied by the accelerometer by tracking rotation or twist.
An accelerometer measures linear acceleration of movement, while a gyro on the other hand measures the angular rotational velocity. Both sensors measure rate of change; they just measure the rate of change for different things.
In practice, that means that an accelerometer will measure the directional movement of a device but will not be able to resolve its lateral orientation or tilt during that movement accurately unless a gyro is there to fill in that info.
With an accelerometer you can either get a really "noisy" info output that is responsive, or you can get a "clean" output that's sluggish. But when you combine the 3-axis accelerometer with a 3-axis gyro, you get an output that is both clean and responsive in the same time."
Digital compass
The digital compass that's usually based on a sensor called magnetometer provides mobile phones with a simple orientation in relation to the Earth's magnetic field. As a result, your phone always knows which way is North so it can auto rotate your digital maps depending on your physical orientation.
Barometer
And finally, you may see a device sporting a barometer in its specs sheet. Contrary to what you may suggest, it has nothing to do with weather. Instead, the barometer is there to help the GPS chip inside the device get a faster lock by instantly delivering altitude data.
Messaging : In addition to pure voice calls, all GSM carriers also offer messaging services and messaging has been a core service since the beginning of GSM mobile telephony. Mobile messaging ranges from SMS, through EMS, to IM and Email.
Browser : A piece of software that allows the user to access Internet sites.
Most current handsets are equipped with browsers capable of viewing common websites (those intended for a desktop browser).
Web browsers on budget cellphones may be capable of viewing only websites specially made for mobile devices. The most advanced devices currently have web browsers with full Flash support that allows them to play even embedded Flash video (such as the videos from YouTube).
JAVA : Often stands for "Java ME" (the new name of J2ME, Java 2 Platform, Micro Edition). Java ME is a platform for applications running on mobile phones. These, mainly small, applications (e.g. games) can be downloaded from the Internet directly to the phone using its built-in web-browser.
