Last night I decided to update my iPhone 3G from 3.1.3 to 4.2.1, everything went well except that now my WiFi option is greyed out and I have no way to activate it. I've tried a system restore/network restore but it hasn't helped.

I did some Googling and found that it a pretty common fault and is only fixable by getting the soldering iron out and replacing something inside.

Does anyone know how to repair the Wifi on a iPhone 3G?

hi mate , thats beyond me but , have a look here

I might end up doing that mate.

Someone told me to put it in the freezer for 10 minutes, I did and it WORKED but only until it returned to room temperature then the Wifi went AWOL again.

Originally Posted by M3NTAL

I might end up doing that mate.

Someone told me to put it in the freezer for 10 minutes, I did and it WORKED but only until it returned to room temperature then the Wifi went AWOL again.

Isnt that feckin strange the way electronics react to varying temperatures,
better make sure I never have to have a mechanical heart

Originally Posted by M3NTAL

Last night I decided to update my iPhone 3G from 3.1.3 to 4.2.1, everything went well except that now my WiFi option is greyed out and I have no way to activate it. I've tried a system restore/network restore but it hasn't helped.

I did some Googling and found that it a pretty common fault and is only fixable by getting the soldering iron out and replacing something inside.

Does anyone know how to repair the Wifi on a iPhone 3G?

iPhone Wi-Fi not working, fix - Apple Toolbox see symptom 1.