WiFi problem

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http://forum.xda-developers.com – Hello friends is there any way to increase the WiFi connectivity?? I'm currently using Real ICS lite r4 and kernal panic. My friend uses the laptop's WiFi greatly all the time but my st15i can't even connect to the WiFi.. I thought laptops have high connectivity than mobile but his Samsung galaxy ace also connects to WiFi and he can browse with ease(though he can't download). The WiFi is common WiFi in our hostel campus, its security is open but we have to input the ip address manualy in order to connect. So is there any app for that? Or is there any tweaks? Sent from my ST15i using xda pr (HowTos)