1. Phone guide for people over 65

2. Not Smart Phones

3. Gyroscope The gyroscope is a sensor that can provide orientation information as well, but with greater precision. Thanks to this particular sensor, Android's Photo Sphere camera feature can tell how much a phone has been rotated and in which direction. Another sensor that most smartphones now have is the magnetometer. It is able to detect magnetic fields. The magnetometer is one of the sensors that compass applications use to point at the planet's north pole. Magnetometer

4. Proximity Proximity sensor is comprised of an infrared LED and an IR light detector. It is placed near the earpiece of a phone. When you place the handset up to your ear, the sensor lets the system know that you're most probably in a call and that the screen has to be turned off. Barometer Higher end phones have a built in barometer. A sensor that can measure atmospheric pressure. Data measured by it is used to determine how high the device is above sea level.

5. Thermometer Thermometer is for measuring ambient temperature. However, there's a thermometer in pretty much any smartphone. The difference is that they're used to monitor the temperature inside the device and its battery. If a component is detected to be overheating, the system shuts itself down to prevent damage. Pedometer is a sensor used for counting the number of steps that the user has taken. Such data is usually obtained by the device's accelerometer, but a dedicated pedometer is a lot more accurate and power efficient. Pedometer

6. Heart rate monitor Heart rate monitor on the Galaxy S5. It is made to measure some one's pulse, and it does that by detecting the minute pulsations of the blood vessels inside one's finger. Fingerprint sensors built into a number of smartphones, including the iPhone 5s and the Samsung Galaxy. The 5s has the sensor most convenient to use as it does not require swiping in order to read fingerprint data. Fingerprint scanners are most often used as an extra layer of security, as a substitute for a lock screen password. Fingerprint

7. A phone's light is what measures how bright the ambient light is. The phone's software uses this data to adjust the display's brightness automatically, when ambient light is plentiful, the screen's brightness is pumped up, and when it is dark, the display is dimmed down. Light sensor

8. Types Of Sensors Accelerometers/Gyroscopes