iPhone 3G / Wifi problem / 4.2.1

OK figured out the 'a' - it's the version for the 3gs duh - Could that be the issue 4.2.1 3gs A version - software update?

Hi, I also have an iPhone 3G on 4.2.1 and cannot connect to the wifi internet at all. Do you guys know when the next apple update is coming?

My FIX



I have had this problem for two weeks and non of the solutions worked.



On your router wireless advanced menu disable 802.11n/EWC reboot your router and the iPhone will work fine.



It is suggested that you use a different name for your network so the iPhone will look at it as a new one.



Hope this works for you all.

I have a Linksys WRT 110 router - looked under advanced wireless settings - I don't think it gives me that option - maybe I am looking at the wrong thing shaitoni - what does disabling the 802.11n/EWC do anyway - as you can tell - I struggle in this area - I also think that the router is build on 802.11n (technology) - not sure but if there is no option to change wouldn't it make the router uh OLD SCHOOL? All I know is my other Iphone 3g old school works the ipad works- Mac works and my Iphone 3GS is useless without wifi technology - WHY - cause I live out in the sticks - NO 3G - Someone needs to address this from Linksys or Apple - I don't care - IF I need a new router - I hope they inform me this year - would prefer to keep my phone and services as well as my other equipment -

802.11n is a new IEEE the older ones are g and b.

Your router must have the option to switch from n to g that is if your router in n.

I would email the router manufacturer support to ask how it is done.

Best luck

Shai Toni Yeheskel

Ok - found the switch - are you saying switch to G - and will all the other apples devices function after the switch? Thanks for you help -

Yes please let me know if it works

Updated router firmware - tried the switch and nothing - My phone will see wireless networks even mine - but will not connect - would this be a wifi chip issue? - I still see networks to join but can't join any - tried it at Best Buy today - no go - and other hot spots - no go - some feel its a network issue and others feel its a 4.2 issue and others feel its a wifi chip issue - I don't have a clue - thanks anyway for the help -

Same thing here, WI-FI greyed out after 4.2.1 upgrade on my Iphone 3G.
Tried everything without luck.

Sometimes it comes back for a bit but will always display "could not search.."

Did anyone else have luck with the Battery Removal procedure?

Try configuring DNS on the iPhone setting>wifi your network blue arrow and than DNS.

For me, shaitoni is on the right track. My password was not taking between iPhone and Internet Sharing on G5. So here I am. Following shaitoni's suggestion above, this is what I found...

I click on iPhone's Settings, Wi-Fi, blue arrow for my G5 internet sharing, and saw all the fields were empty (IP Address, Subnet, Router, DNS...).

While I was contemplating what to do, these fields suddenly became populated. This took < 10 seconds.

I suspect that this problem is ultimately a "permissions" problem on my Mac. Under the G5's System Preferences, Sharing, Internet Sharing, the items for choosing what protocol to share, to computers using which protocol, and "Airport Options..." are all grayed out.

I'm fine for now, but will not be able to change my password for Internet Sharing until the grayed out stuff is not grayed out. Permissions are causing a slow death to my G5. Recently, I found that I can't run "Activity Monitor" anymore, no permission. That's another topic, though.

just take it to your local genius bar,they are really very helpful and if they can't fix the problem they will replace the iphone,,,believe me ive taken 2 iphones back after firmware upgrades,and both were replaced

Exact same problem here. iPhone 3G with 4.2.1. No wifi. It doesn't even find networks. There's no sense in me resetting my home wifi since it doesn't find ANY wifi networks - office, home, coffee shops, etc. I have rebooted, reset network settings, still no luck.

Any more thoughts?

Thanks!

The full battery power down worked for me. I drained the battery as much as I could (using GPS, video, music, etc.) until it showed only the red recharge-the-battery icon. It has now recharged and appears to be finding and connecting to wifi networks.

It didn't connect right away, but after a few tries, it did.

Hope it lasts!