thank you I'll try soon.The best way to uninstall bloatware is Titanium backup or Link2sd
I now have successfully installed the stock rom from sammobile and it is already less cluteered with junk applications then the one the phone came with, but I have 2 big problems:
1) there is no 3G connection. why???
2) I rooted and installed OC kernel following these instructions but I ended up with exactely the same wifi problem described 2 weeks ago by khrisstyan.
does it mean I need to start over again with an older stock rom? and wher do I find it? and does it make sense in your opinion to run an outdated firmware for having OCing?