1, 8900, 9650 can meet your first requirement, no problem.

Both 2.8900 and 9650 can solve this problem, and the high requirements may be different. The requirement is so low that it can be solved.

3. Theoretically, the running speed of the system is the same and should be similar. Both English-Chinese dictionaries 8900 and 9650 can go to the next one by themselves.

4, the trackball 8900 is very painful, it should be inclined to 9650, and it is often necessary to replace the 8900 ball. As for 8900, I have been disconnected five times in 1 day, so if you choose 8900 and you are really grumpy, the machine will break down in two days. Common solutions, such as hybrid brush, blackberry intermittent paste, engineering mode to repair broken network, are not particularly easy to use. Personally, they will make you feel the urge to drop the plane.

5, if the appearance is atmospheric, I personally think that 9650 and 8900 are good. As for the number of users, the BlackBerry itself is very small, so don't worry about the plane collision. If the price is around 800, it is recommended to renovate 8900.

I hope I can help you.

Search online, in fact, it is easy to solve this problem by yourself.