[HD2 General] rzasharp:
Hi there. I'll try to give you more "readable" info about the issues you mentioned. I'll just change the order of the questions...

Having to install 3.5 compact .net. I still don't know how to do it

You can use the official Microsoft link provided by 27firesnake, but you'll have to do some reading... The simplest way is to download a cab and install it directly on your phone. You'll fine one here (item #18). You should do this first, as many great applications (including BsB Tweak) need this system component in order to work!

I haven't a clue what a ROM does nor how to install them

Well a ROM is basically your operating system (Windows Mobile) + HTC Sense (homepage and tabs). You are currently an official RO (usually called "stock ROM" in this forum). What we need to know is what version you use? Most likely 1.43 or 1.48, which are not the latest from HTC. The most recent released ROM is 1.66 and runs smoother and might give you better experience overall, even though there no major updates (just a compilation of fixes). Anyway, some people manage to get "not yet released official ROMs" (usually called "leaked ROM") and are able to install them on their devices. The latest leaked ROM is 2.07 (that should appear on the T-Mobile HD2). Anyway, I would not recommend installing a leaked or cooked ROM for the moment, since you're still a newbie and just received your device...

Simpler answer: you should install the official ROM 1.66. Try to go on the official HTC website to do so. If your serial number is rejected, you should contact your carrier (Virgin) to know when you'll be able to download it. People here will advice you to install HSPL to be able to bypass this protection, but as I said, you should wait a bit more, when you know Windows Mobile more. To learn more about that subject, go to the link in my signature.

Having to double tap and go into the email fully so it appears read

Well this doesn't seem to be a problem, or I don't understand? The email appearing in the Mail tab are just "previews" of your email and you should tap to get in the "real" e-mail application to read them fully.

Tapping to reply to a text yet nothing happens

I don't understand. You're not able to answer to a text-SMS ?

When using the 'phone' keypad it types in numbers

Again, this doesn't appear like a problem. I mean, you should compose phone numbers when in the phone application. If you write the beginning of a number, you'll automatically see the contacts whose number begin that way. Anyway, if you prefer, you can use the People tab (then "All People") to choose a contact typing the first letter (instead of phone number).

The phone screen basically crashing so when you press a button it doesn't show the unlock screen.

Is it real crashes or just freeze? I mean, I you wait for a long time, like 1 to 5 minutes, the lockscreen doesn't come back? Many people, including myself, reported some freezes from time to time, but the new ROM 1.66 really improved thing on my side. You might look for this thread for more and this one too.

Pressing the x in the corner of an app yet going to task manager and its still open

OK, this is easy to solve. Just install the "Duttys HTC Task Manager". It will install a task manager and enable the closing of any application using the cross. You can find the cab here (tip #7).

The over sensitivity when typing a text

The latest ROM 1.66 decreases the sensitivity of the touchscreen. If you can't install it, the easy way to solve this is to install the (very recommended) tweaking application called "BsB tweak". There are a lot of simple tweaks you can ON/OFF. One of these is called "decrease sensitivity" or something like that. If it's still too sensitive, then you can install the fixes found here. Just to be sure you don't have a flawed unit, check if you touchscreen has the following problems (go see the youtube videos too).

showing words that don't make sense in the predictive text

I don't have answers for that one, but I know the predictive is not the best on this mobile. You have two options:

1 - improve your typing thanks to the less sensitive touchscreen (if you make less errors, the prediction will be more accurate :D)

2 - install an alternative keyboard like Touchpal or maybe Swipe...

Having to f**k about for ages to get wi-fi off grrr!

Well, there are numerous ways to solve this issue.

- you can install a shortcut on you home page for the (already installed) "Comm Manager". Comm Manager is already installed and was designed for you: it is a collection of ON/OFF switchers (wifi, bluetooth etc).

- you can install an application that simply switch wifi ON/OFF.

Then

you install a shortcut on your home page, so you simply tap it to enable or disable wifi. You can find an application like that here (along with a lot other more)

Hope this long post helps