I want to try other mobile phones, such as Blackberry 8800 and dopod 720w, and I want to know which one suits me best.

Dopod 720W suits you, and I am also a student. I have used dopod C730 and Blackberry 8700, and the running speed is similar. Dopod is the best in software. As you know, BlackBerry software is scarce. On the other hand, BlackBerry software can only be installed in the memory of mobile phones, not on memory cards, which is fatal to people who like to play computer games. As far as BlackBerry is concerned, there is not much software in the memory of the mobile phone. Also, mobile phones in dopod can use portable applications. The so-called portable application does not need to be installed and can be used directly on the card. Then there is the input method. A4 and Telecomm on dopod are very easy to use. Blackberry can only use Baidu, and it is a bit troublesome to type in notepad before pasting. Then there is the network. After the WM system in dopod is connected to the computer, you can enjoy the broadband on the computer, that is, the computer drags the mobile phone to surf the Internet, and WIFI is also very easy to use. There are many BlackBerry. Of course, blackberries are also very useful. The mobile phone has the advantages of fast Internet access, good signal, relatively low power consumption, good stability and immortality. If your hands are loose, I suggest buying both, which is very good.