There are approximately 3.4 billion mobile phones in use.
All SMS in a day
The equivalent of 45% of the planet will send an SMS at some time today.
More Mobile Facts
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.
The cellphone is actually a very complicated radio that communicates with the cell tower in the area.