Thanks you guys I was able to flash my SmartQ7 to ver.4.0.
Now I have been trying my butt off to install Okular. I need a PDF reader with the ability to highlight. After adding another repository (deb
http://ftp.de.debian.org) I was able to install Okular.
But when I try to launch it, it gives an error saying "no such file /usr/bin/okular". But there is one.
The strange thing is, now Evince is not opening either. It was working before I installed Okular now it also gives the same problem. Also says something like unable to lauch child process (or something along those lines).
I really really want Okular. And I Have been through quite a mess to come here and I am really really tired

. Anybody please give my advice.
Thank you.