internet services of blackberry

The primary alternative to using BlackBerry Enterprise Server is to use the internet services of the blackberry phones. BlackBerry Internet Service is available in 85 countries internationally. BlackBerry Internet Service was developed primarily for the average consumer rather than for the business consumer. BlackBerry Internet Service allows POP3 and IMAP email integration for an individual personal user. However, the integration features only one-way synchronization; changes to messages on the device are not reflected back to the email server. BlackBerry Internet Service allows up to 10 email accounts to be accessed, including proprietory as well as public email accounts (such as Gmail, Hotmail, Yahoo and AOL). BlackBerry Internet Service also allows for the function of the push capabilities in various applications of blackberry. Various applications developed by RIM for BlackBerry utilize the push capabilities of BIS, such as the Instant Messaging clients (like Google Talk, Windows Live Messenger and Yahoo Messenger). The MMS, PIN, interactive gaming, mapping and trading applications require data plans like BIS  for usage.