A mobile phone, cellular phone, cell phone, cellphone or hand phone, sometimes shortened to simply mobile, cell or just phone, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. The radio frequency link establishes a connection to the switching systems of a Mobile Phone operator, which provides access to the public switched phone network (PSTN).
The first handheld mobile phone was demonstrated by john .F and Martin cooper of Motorola in 1973, using a handset weighing c. 2 kilograms (4.4 lbs.).In 1979, Nippon Telegraph Telephone (NTT) launched the world's first cellular network in Japan. In 1983, the was the first commercially available handheld mobile phone. From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion; enough to provide one for every person on Earth. In the first quarter of 2016, the top smartphone developers worldwide were Samsung, apple, and Huawei smartphone sales represented 78 percent of total mobile phone sales ,as of 2016, the largest were Samsung, Nokia.
1. They are convenient.
It’s great being able to call a friend when you are out and about – without being tied to a land line.
2. They can be life savers.
Taking a mobile phone with you when you go hiking is a basic safety precaution. If you lose your way or get stuck in bad weather, your mobile phone could just save your life.
3. Staying connected.
There is no need to feel lonely when you have a mobile phone in your pocket: just connect with friends via text, FaceTime, voice calls or social media.
4. Fun and games
These days, mobile phones are loaded with all kinds of fun games. We all remember Nokia Snake, but more recently people have got way more into challenging their brains with Sudoku or whiling away the time during a long commute with a game of Candy Crush Saga.
5. Your mobile keeps you informed.
Whether you are searching for that Spanish word you read in the newspaper or reading some articles on a topic close to your heart, mobiles that are connected to the internet are a treasure trove of information.
6. Getting snap happy
Sophisticated cameras mean that you can take professional quality photos on your humble cell phone.
It’s so hard to work when your phone is tempting you to pick it up.
You’re trying to have a romantic date and yet are plagued by incessant calls and texts.
It is easier than you might think to become addicted to your mobile phone, and so dependent on it that you forget to communicate in real life.
It’s ironic, but some people feel that the cellphone (which is designed to keep people connected) can actually drive us further apart. Have you ever seen a group of friends at a restaurant, looking down at their phones instead of each other? That.
5. Security issues
If someone taps in to your data they could steal your identity, pilfer your photos, and erase your contacts list.
6. Eyesight issues
Hunching over your phone screen for hours in the dark can strain your eyes.
Tapping constantly at your phone can lead to repetitive strain injury (RSI) in your fingers.
so my conclusion is that while using the mobile phone ,unnecessary we don’t use the phone longer time because it causes our eye and our body also….so better to avoid using android phones instead of using android phone prefer laptop an other things it can be very comfortable to use and we can’t strain our eye todo working