Technically, BlackBerry phones are PDAs as well as a phone working on push technology. With a usual phone with internet access, one will have to check the mailbox regularly or frequently, or keep a mail client active at all the time, which may lead to low battery backup. But with BlackBerry, you don't have to worry.

BlackBerry phones use the push technology, where all your emails, calendar entries, documents or any other data directly to your phone via the internet. This is possible due to the BlackBerry Enterprise Server (BES), responsible for the forwarding of all the mentioned items. All the BB devices are assigned a PIN (Personal Identification Number) and are integrated with the BES.

This BES actively monitors the users mailbox at all times. When it sees a new item in the mailbox, it pushes it to the network operation center of RIM, which further uses the network service provider's services to push the item to the user's phone.

All the data which moves around the BB devices and servers and operational centers, are encrypted. BB uses the triple Data Encryption Standard (DES), and more recently the Advanced Encryption Standard (AES). Encryption is done to hide the personal info that is essentially trasmitted during a transaction. BB uses highly complicated algorithms to achieve this type of encryption and its very hard for a person to intercept the data.

This unique kind of operation is what caused the popularity of the BlackBerries. With this technology improving over time, BlackBerry is committed to change the way that the corporate world functions.