LG G2 F320L - Wifi not turning on and no mac address

[Shaker Bin Sulaiman]

Hey everyone...got myself a new G2 ( the korean version - F320L) ...the wifi was fine before.. but after installing a new rom, i can't seem to turn on the wifi....It shows "Turning Wi-Fi on" but nothing happens...i also noticed that my Wi-Fi MAC address show "unavailable"....i dont know what to do...I just switched to andriod after using iphones for 3 years and i dont know much about androids.. i read in a thread (http://forums.androidcentral.com/motorola-droid-pro/235830-droid-pro-wifi-wont-turn.html) that you should try and hit your phone but nothing works.....please help!!