It's okay I flash the mj kernel into it and the Wi-Fi worked again... BTW can I ask which base band or radio currently is the most stable and battery saving?
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That really depends on your region and provider.
On the S2 and S3 i tested a lot of them and in my case, there was hardly any difference between them.
But if you have a good signal, i would leave it by that for now till more are available.
And i think it wouldn't take long before Sammy will release a KitKat rom.