QUOTE(toobad @ Feb 12 2013, 03:15 PM)
My problem is the wifi does not work even if i use my laptop beside the router, regardless of its distance, it still has shitty speed. However, if i connect using LAN, it works fine, perfectly fine. And this happens like quite frequently, like for now, the wifi is working fine, yesterday night for about 4 hours i need to use LAN cable to connect to the internet.
So my question is, what is the problem? with the wifi signal? Router settings? Router problem?
LAN works fine for me too when the WiFi isn't working! According to my cousin, it happens at night mostly and usually randomly throughout the day, he was playing Battlefield 3 earlier, his ping spikes to 999 - 1500ms and then back to normal, then spikes again after some time.
WiFi signal/settings within 192.168.0.1 control panel cannot modify. As above in my first post with picture attached, I tried to modify the setting and I get "No changes are made, continue?"

I think it's router faulty or entirely, the router itself is not properly made by L7. Are you using L7 router?