[Windows Phone 7 Q&A, Help & Troubleshooting] sylau90:
Ok, once again, To the OP, don't get WP7 device at the moment. If you don't trust me, you will definitely regret. I owning an iOS device, WP7, webOS and android device. Therefore, what I said are based on a true and fair view.

firstly,regarding your question, WP7 is able to read PDF and documents. words,powerpoint and excel files should work perfectly with Skydrive. However, PDF is not. the app has no skydrive integration and you can't use USB transfer to your device either,in order to read your own PDF files,what you can do is attach the files using your email client on pc and send it back to yourself. Then,you only can read it on your device. Plus the PDF viewer app has not been updated for ages/months.

Of course,someone said that WP7 covered 90% of your functionality,but the another 10% is the frustrating way to get things done on the device.

Furthermore, as you mention, you need some medical apps, as for as I know, there are nearly 0 medical app in the marketplace.

yea,sure you can compare 4.3 480X800 to a 3.5 640x960 screen. What I can tell you is the text on iphone 4s will look more crisp(on both browsing & reading) due to the highest dpi in the smarphone market. If you prefer larger screen,then I have nothing to say.

As someone mentioned above, WP7 still doesn't support full device encryption. Therefore, not really suitable for corporate use.

For the email and messaging part, WP7 has no issue with it. Everything works pretty well. However,the notification is pretty crappy. This is my own experience,firstly I do not have an unlimited data plan on my wp7,therefore, I never turn on the data&3g connection. What I do at home is just simple connect my device to wifi all the time. However, when the device is idle, the wifi will be disconnected and does not get any notification from third party apps such as kik messenger,whatsapp &IM+.

Besides, in terms of hardware, all of the current wp7 device, is still using processor from 2010&2009. It is true,everyone said that WP7 does not need dual core,1gb ram& bla bla bla.....However,without the good hardware,the device is not future proof. For example, everyone who owned a WP7 device now, including me. Just after the mango update,then I think we are done,it is extremely&highly possible we will not get the official windows phone 8 update.

As for the good browsing for reading article, if you are like me, love to open many tabs and read all at the same time. Then, you shouldn't get a windows phone 7. After the mango update, microsoft has removed the tab button at the menu bar,therefore it is frustrsting to switch between tabs,therefore, I'm using a webOS device now. However, on iOS, what you have is options,Opera,safari,firefox& etc. You choose whatever you like.

I have typed all these things pretty long,if you want more information,you can just PM. I didn't say which one is good. Just try to listed down all the facts.

In this forum, what I can say is, there are whole bunch of WP7 fanboys. They not even allow someone to say a single disadvantage of WP7. If you did say one, there are only 2 ways they will reply you

1) you are a troll

2) Just wait, wp7 is still a baby and still young. And, wait for it's upcoming update. The problem is are our devices capable for the upcoming major update is still remain unclear.

To the OP, why don't you just get a device that already can do all the things you want,rather than give WP7 a shot when it is still not ready??you have to wait at least until WP8. Thats all I can say.