The purpose of the antenna is to attract the radio signal from satellites orbiting the earth back to your vehicle. It is not as impossible as you may think since the antenna is highly tuned for the exact frequency that satellite radio providers use. Our only job is to position it in a place where it works close to 100% of the time.
The most basic function of any mobile phone is to send and receive phone calls and SMS text messages. Beyond the basics couple mobile phones have calculators. Others have voice answering and voice dialing, allowing you to send and receive phone calls without using your hands. More complicated phones have built in digital cameras, MP3 and video players, pc games and other features.
All mobile phones normally come with a battery and charger, but there are other accessories that can be useful to you. Check to see if the phone comes with a spare battery, an earphone, a leather casing, a neck strap or an antenna. If you need any of these accessories and if they are optional, then your phone will cost you more than you thought. If the accessories are part of the deal, then you can be getting a bargain. Also, if you don't desire an accessory now, but might like to get one in the future, test to see if accessories for your model are simply available on the market.
Battery life is an crucial variable. The average user only asks about the "talk point" of a a battery. However, "stand-by" time is simply as essential, especially for folk who do not desire to carry around a charger with them.
Keep everyone electronics CLEAN! Get a may of air duster (made for electronics) to blow your recipient out periodically. Do this at least once a month. More if you live in a dusty area. Remember that dust is electronics worst enemy. Unplug the receiver before cleaning.
Using a mobile phone in a car is as risky as using it inside an airtight room full of electrical equipments. The radiation increases many times risking your health. Thus to normalize the radiation, connect your mobile to a car roof antenna. It helps to receive and send signals efficiently.
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