What affects Nokia E62?

These days, I have been paying attention to Push mail and blackberry. Microsoft Direct Push provided by Exchange is very good. In this way, you no longer need to pay the Push mail fee to China Mobile. You only need to pay the GRPS fee.

What about Blackberry? 398 per month, only 50 M, too expensive!

However, Microsoft Direct Push and Windows Mobile phones are well integrated, but we cannot require all people to change their mobile phone OS. Is it Windows Mobile?

In China, Nokia is undoubtedly a large user. Let's talk about it first. Nokia has a software called mail for exchange, which is good.

However, unfortunately, when I use E62 for testing, I can push it, but what I am puzzled about is:
When using E62 to open mail, the speed was quite slow (8 S). I asked another colleague who used mobile push mail, the result is that N73 emails in the Mobile Phone mailbox are also quite slow! It takes 10 seconds to reply to the email and start writing the email!
I don't know if anyone in the garden has used Nokia or Push mail. Tell me one of the acceptable Nokia models!

If not? Do they all need to be replaced with Windows mobile phones?

It is said that the BlackBerry mobile phone opened and replied to the email quite quickly. Is it true?
Is there any brother in use? Send a reply to see how it works?