Mobile phones
In addition to voice calling, mobile phones are becoming a platform for other kinds of information services like text messaging, email, and basic web browsing. These are all of potential use to activists.
You can broadcast a text message (broadcast SMS) to the mobile phones of a large group of people to promote an event or service or provide an update to supporters.
Many charities and other nonprofit organisations are using text messaging to increase donation levels. Text messaging can give nonprofits instant access to supporters.
In addition to voice calling and text messaging, mobile phones are being used to send email. The process involves sending email to a mobile phone from a PC. The mobile phone user can reply directly to you, again via email.