Many Nokia phones come with a reserve battery. To activate the battery, key-in *3370# your cell will restart with this reserve and your instrument will show a 50% increase in battery. This reserve will get charged when you charge your mobile next time.
Mobile phones in use
There are approximately 3.4 billion mobile phones in use.
More Mobile Facts
The cellphone is actually a very complicated radio that communicates with the cell tower in the area.
In Britain on January 1st 1985, the first call on a mobile phone was made by Ernie Wise, comedian and one half of the famous duo Morcambe and Wise.