BlackBerry Service is different from other mobile OS,
There are two plans,BIS & BES both are maintained at Server level by the service provider,
You can create 10 accounts folders in BIS online which is maintained at the server and transmitted to your device.We cannot create any account in our own blackberry device,only online.
Once you stop the plan,all your mail folders will disappear in your device!
In unlimited plans,you can browse unlimited way and connect to your PC by Tethering! in addition to unlimited mails and attachments.Plan charges vary,I pay Rs.6999 per annum for unlimited plans.
Even cheaper plans like Rs.299/pm (for unlimited mails & chat but no browsing!) are also available.
In Android,a similar PUSH concept exists ONLY for gmails.Other mails like POP/IMAP are supported only in PULL fromat.Unfortunately Android doesn't support FREE mails in Client.We can use browser to check them.
Unfortunately,even iPhone supports PUSH only for Yahoomail and MS Exchange.Other POP/IMAP are only PULL type.IF you are willing to pay for MobileMe,then you can get PUSH mails indirectly.
If somone lives on eMails for survival,then there is NO match for BlackBerry,
More to come......!