Help! Porting WiFi from Gingerbread to Jellybean.

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First of all thanks for reading . :D

Could any tell me how to port WiFi drivers, suplicant file, etc completely

from Ascend g300 running 2.3 android to ascend y300 running 4.1.1.

So far it seems corparate wifi works in gingerbread. No luck for Jellybean.

Help or advice would me much appreciated. Thanks again.