wifi connection problems iPhone 4

[crazy$hark]

When i connect to my home wifi (full bars) it connects. Recently whenever i try to use the internet on my phone it says that there is no internet connection while the wifi bars are full. Its not the internets problem cause iPad and Macbook both work. What should i do to fix this?

 

[-aggie-]

Clear the cache or reboot usually fixes this. Or you can re-add the wifi network.

 

[crazy$hark]

Clear the cache or reboot usually fixes this. Or you can re-add the wifi network.

tried all that (didn't work), but randomly after sometime it started working again

 

[vitasenza]

I had that problem with my iPhone for a long time. I had to do some digging on my router to fix the problem.
I had to clone the mac address of my computer to ensure a stable connection from my modem to the router. Don't know if it was necessary, but I turned protected mode on for my wireless and have it broadcasting b, g & n with both 20/40 mhz.

I would suggest looking into the settings for your router and try messing around with some of them. My iPhone used to take a little bit to show wifi connected after unlocking, and even then I would have to turn airplane mode on and off to actually be able to use my connection otherwise I would get the no internet connection message.
After messing with the settings wifi pops up as soon as I unlock my phone and it appears to be much faster than it used to be.