iPhone 4 wifi signal issues greyed out

If Settings shows Wifi as grayed out ("No WiFi"), then the WiFi chip on the main board is bad and you will have to replace the whole main board.

hi I reopened and found out the couple of screws were not in he right place as their are many screws of different sizes I just rearranged the screws according to the ifixit guide and it worked out perfectly.Thanks for your reply.

if you have no wifi the gold antenna at the top is most likely damaged

Good News Everyone! After I had spilled water on my device about a year before and I got the same problem: my wifi was greyed and bluetooth was not working either on my iPhone 4. I tried all possible solutions:

1. Airplane on, turn the iphone off, turn the iphone on, turn airplane off, and then wifi was supposed to start working. BUT not with my device(

2. Freezed it for 30 min in a plastic bag. BUT it was a time waste.

3. Then settings-general-reset network settings/all settings. BUT it didn't work.

4. Eventually I diassembled my iPhone 4, removed all 5 screws from wi-fi antenna (NB: pay special attention to 4.8 mm screw, as it is supposed to be the primary reason for wifi bad performance), cleaned all these screws and all metal-to-metal contact points on the connector cover with a de-greaser. Then reassembled it

AND WI-FI APPEARED!!!

Thanks to ifixit)

I dropped my iphone 4 in water. It didnt even completely sumbmerge in it but not my wifi is grayed out and wont work. What do I do?

Where is this screw your talking about? I know I have some missing

on wifi antena on iphone 4 where does each screw go because i have 5 and they are diffrent sizes and im not sure wich one goes where please help asap thanks

Not long off the phone to apple as my wifi was greyed out

And what they told me to do was add other user account on my laptop and try

Reinstalling latest update via iTunes and presto wifi back hope this helps others out there

Mikey w:

How do you add other user account on the laptop? On iTunes?

Hello everyone I have an iphone 4 16GB white. So, you see it had a broken screen we fixed the screen I fixed the screen. The first time I fixed it but I couldn't put back the back cover so I putted the cover on and then pressed. The second time I fixed it i put the screen back on and I ordered a new back cover for it so, as I was saying, it worked so I restored it and it said (error 21 ) so I checked what was (21) it was the battery connector I fixed it and it worked but you see when I open the phone to answer those question that they give you the phone didn't ask me the wifi so when I opened the phone I tried the turn the wift on from off and it's silver no one can press anything so please tell me my prom lie and how to fix it ASAP.

I had this issue with my iPhone 4.

I attempted all the suggestions, reset, replacing dock flex and standard Antenna, Freezing, heating, turning it on airplane mode and do not disturb and none worked for me.

I FIXED THIS ISSUE by cleaning the gold contact at the top left of the motherboard and also cleaning the section of the Chassis which it contacts onto. I used Contact Cleaner however I believe any moisture will work provided it is allowed to dry in time.

Good luck to all those with this issue.