First, you're getting a lot of criticism for your lack of proper grammar and punctuation. Assuming English is not your second language, this criticism is correct!
However, I'll forgive you and give you the benefit the doubt, and blame our deficient education system for this. Nah, just kidding!
Slow down, write in complete sentences, use periods, try separating different thoughts into paragraphs, and try to think about your poor audience who takes their valuable time to read about your problems.
Regarding your problems:
I've looked in three app stores and haven't found anything called Sky Go, so I can't help you there. Regardless, I don't know of any Android device that is compatible with 100% of apps. That's what you get with the highly customizable and open world of Android and its myriad assortment of devices. Your alternative is that dark, closed world called Appleland.
There was never any claim that the Nexus 7 would be compatible with a 3G dongle, as you stated you already knew. Why would you assume it might be? It's your responsibility to do proper research before you buy a product, to see if it can do something that it says it can't. That's what forums like this are for.
HDMI was never on the spec sheet, so it's not valid to complain that it's not there, at least not after you've bought the tablet. The same goes for the micro SD card slot. Feel free to voice your disappointment that it's lacking these features before you buy it, but to complain about it after you buy it doesn't make much sense.
Sorry to sound so critical, but I tend to respond less harshly to well thought out complaints. Anyway, good luck with whatever tablet you end up with. I hope it meets your needs and doesn't stop working during the first week of using it.
(Yeah guys, I know I spent way too much time responding to this post, but I'm unemployed and my alternative is to go out and look for a job, which would greatly interfere with the time I get to play with my wonderful Nexus 7!)
Sent from my Nexus 7 using Android Central Forums