I found the solution by own testing
The problem that I meet early is turn on wifi and can't search any wifi connection event my own modem, after I try few round and the last thing I do is change the SSID name without any "space" between 2 words, then the Iphone just search my modem &..... Online .

Hi, I recently upgraded my US set 3G iPhone to firmware 3.1.2, after the upgrade, the iPhone failed to detect any wifi network at all, i've tried at different places and time but to no avail. Resetting the network settings did not help either . Any recommendation guys?

I used to have the wifi problem.I manage to fix it after sending my i-phone to a shop in low yat to fix it.

The wifi chip was burnt.

How much does it cost u?

I get my new set, after 2 days, it cant detect the wifi. Consider wifi chip burn ka bro?

RM450. Quite expensive,IMO.

It could be any reason,not just wifi chip burnt.

Who knows the next release of blacksnow/blackra1n can fix wifi problem..

Restore iphone OS.

I'm having the same problem after upgrading to 3.1.2. Cannot connect over WIFI


http://forum.lowyat.net/topic/1037479/+920

Quite hard to say,as in my case,the whole wifi chip was burnt.

how does it happen eh? excessive usage?

Hi,

Can you share the name of the shop in lowyat that is able to fix the burnt wifi chip?

Thanks

it take u how many days to fix it? my wifi chip oso burnt..... at low yat whr?

Hey guys, I have a question would like to ask:
If I'm connecting the WiFi, but I didn't do any web surfing, is it will drain my battery more faster?

sorry edited.....

This post has been edited by syNzoR: Jan 22 2010, 02:44 PM

Allow me to answer by asking a question.....if you switch on your TV but are not watching it, will be consume energy? May be pedantic but should give you a clue.

anyway if u switch on wifi but not using intenet, the battery will drain abit fast only for me..

does any1 know in kl got any where can fixing wifi chip??

in lawyat plaza lo.. if not u try to find the seller here like crxr he fix iphone u can ask regrading it.. over here seller probably more cheaper then lawyat plaza

for those whose can't see any wifi addresses after upgrading/jailbreaking 3.1.2, try this method:

1) turn off your phone

2) open itunes on pc

3) while itunes open, connect iphone to your computer

your iphone should bot after that. after booting, the wifi probelm should be no more.. well, at least it worked for me.

Seriously and honestly speaking, there's one instruction i googled which is putting the iphone in the freezer for about 5 mins, and guess what, my iphone DID DETECT wifi signal!!! and i CAN connect to the wifi! i'll update in 1 hour time whether its still connecting..


p/s: i assume it is the hardware problem then.. It will cost me freakin rm400++ to change it! damn

This post has been edited by skadimo: Feb 2 2010, 12:10 PM