I have the same issue. I rooted my phone with this guide, it went really well and fast. there was no wi-fi after rooting with this method. so I went ahead and flashed a custom rom and wi-fi is working now.I followed the above instructions to root my SG2 and unlock it. Everything went well except I do not have wifi anymore. My baseband version is I777UCKK6 and my kernal verison is 2.6.45.7_Zedomaxstockkernal.
What I need to do so my wifi start working. I had hard clean swipe the phone still no luck. I have no clue what to do. Some of my issues are I do not undersatnd all of terms and really naive when it comes to technology.
1. Do I need "Flash the phone back to the store" use UCKH7-CL503881 posted by creepyncrawly?
2. Or use oneposted by Entrpy512 "retrun/KK6 return/unbrick to stock" I tried to download UCKK6_stock_rooted but somehow can not extratc the files.
3. or there is any easy step.
I really appreciate it if someonce can help me on this.
so I'm thinking it's the kernel.
but i didn't meant to remain on stock anyway so this is not a big deal.
and wanted to say a super big thank you to zedomax. This method is so simple. there are some other guides out there but this one included a kernel with CWM so I didn't have to do root, kernl, CWM;