Comparison of Blackberry connection with another OS

connection problem blackberry devices are also able to use GPRS and 3G (a particular series, I understand the new 8707), but the difference is, if the other devices to attract our email inbox must be done manually (PULL technology) or even if there is we have to install 3rd party software while the blackberries, emails appear without the 'invite' er means withdrawn, such as sending SMS, emails on