Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White.

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Does anyone know other potential causes for a poor wifi signal?

Hey everyone,

a few days ago I got my sisters old Iphone 4 to make it ready so that our dad can use it.

While I was doing so I noticed that the battery was quite weak, so I ordered a new one and replaced it. Now I have a very weak WIFI signal. (The little problem is, that my sister can't clearly remember whether the wifi was working before she stopped using the iphone or not... so that it could be an issue which dates back some time - however she thinks it worked just fine)

Anyway, it's the same phenomena that I have already read lots about (only 3 bars while being 50cm away from the router and no signal at all in the next room). Problem is that I only found threads with users who tried to replace their screen or tried to do some more serious repairs and in almost all cases the cause was the "wifi"screw (the long one), or the lost clip that is used to make contact when the "wifi"screw is tightened.

Things is, as I said, I just replaced the battery - so that I shouldn't have come into contact with critical areas.

What I tried so far:

1) rebooting the Iphone

2) resetting and installing a new IOS (6.0.1)

3) disassembling of the wifi-shield to check for that little contact everyone loses during their repair (as expected it is where it should be)

4) cleaning the contacts

5) using tinfoil to make contact between the long wifi screw and the frame(saw this here:

http://www.beijingiphonerepair.com/fix/f... )

6) talking to the little man in the phone, imploring him to repair it -.-

However, every single one of my attempts was in vain.

Help is greatly appreciated!! Seriously I am going nuts over this ; /

What really is strange is that GPS and cellular data signals are working just fine. It's really just the wifi signal..

I am about to give up on it(and probably would have done so long ago if it wouldn't be for my old man..

cheers

nico

Update

Ok, sorry for the long absent time - it took the part quite some time to arrive(the new speaker with the mounted antenna)

I installed it right away, but nothing changed ... so it was not the cellular antenna after all -.-

well .. worth the try though!

Any other ideas ?

Answered! View the answer I have this problem too

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Edit: Today I replaced the wifi-shield with the wifi shield from my own Iphone 4- still no changes, so it is not the wifi shield.

Is it possible in any way that the cellular antenna (the one that's mounted on the speakers) is damaged and influences the wifi signal strength although the cellular data signal is good ??

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I think the cellular antenna does play some part in the wifi signal-sure I've read it somewhere recently. You could just unplug your connectors and if you had a known good part (as we all do) plug the antenna (black wire connector) and dock back on..change in wifi means it's the antenna.

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@ pollytintop So you are saying that the cellular antenna could be the thing that influences the wifi signal strength? Hm, I thought about this before but discarded the thought right away when I saw several posts that these two don't influence each other. But I will try it now that I am not the only one anymore who is thinking this could be the solution :)

Thanks I 'll update the thread once I tried it.

(Could be some days since I have an exam coming up in the next days )

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I would look at a new mid frame Nico.

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Wow I thought I was the only person this has happened too. I pulled my phone apart to look at a stuck power button. I fiddled around a bit and when I put it together the perfectly good wifi dropped out unless in the same room. I've taken the EMI plate off atleast a dozen times following all those other 'loose screw' guides but still no help. I'll follow you and hope a wise techie responds.

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The answer to your newest question is no, and I will look real hard at a answer to your problem today.

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Nico, does this phone have a color conversion, specifically an electrolux kit ?

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Hey Mitch, thank you for thinking about my post.

The phone is, apart from the changed battery, in its original state. I was the first one who opened it up, though I did nothing apart from the battery change.

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I was just Looking at an I 4 GSM mid frame under a Mic at the threaded hole that the wifi screw threads into and the area around it, the only thing I see that could be wrong there would be the spot welded plate that the screw is in would have not been welded correctly and not making good contact with the frame, if this is the problem the only fix would be buying a new blank frame and transferring all hardware to it. Here is a link to one and its blue, why not pimp your phone during this operation : )) http://www.mengtor.com/product_show.php?... Of course there are no guarantees this is it but I would say worth the gamble, good luck ! If this answer was helpful please remember to mark it accepted.

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Hey,

I thought about that too, but I somehow came to the conclusion that it can't be the contact to the frame since I tried to use tinfoil to make contact between the frame and the screw. Didn't I, by doing so, bridged that badly welded contact(if it is badly welded)? When I tried that I used my Voltmeter to check whether there is a connection between screw and frame.(connection was there between frame and screw)

cheers

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Dang your phone is perplexing ! Exorcism maybe : ) , kidding, I'm at a loss for now but will think on this more, and if I had a gsm frame I would send it for a test, all I have is the cdma frame now.

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Have you considered interference? What is your router broadcasting? b?g?n?b/g/n? do you use a cordless landline on 2 Ghz or 5.4Ghz? A few settings tweaks are often all a poor wifi signal requires.

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Good comment Nathan, maybe try a different phone in the same wifi area and see if you have the same problem.

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Hey,

I have considered interference as well and tried different router settings. Though I must admit that was more out of desperation, because my own Iphone works just fine with my routersetup. I don't know whether one Iphone can really behave so different from another one, but since the Iphone which is not working doesn't find any wifi at all when I am out of the router room and my own finds 3+ different wifi signals I think this is not really the issue. :(

Thanks for your thoughts though !

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The answer to your wifi issue is 100% the battery connector is failing as like u I replaced all possible parts and found it to be this hope this helps ;)

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Thank you samantha,

so what exaxtly did you do to make it work again ?

Did you order a new connector and soldered it on ? How did you remove the old one safely?

I really appreciate your answer as I had given up all hope for a decent wifisignal :)

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Yes there's a little connector right near the battery clips in its where antenna connects to ;)

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Maybe this issue is your WLAN signal be weaken between your phone or NB, you can try to replace your WLAN or to paste "Perfecting Signals" on your WLAN Box for improve its quality of the WLAN signal.

More detail info to see below link:

http://utilityhome.blogspot.com/

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nico will be eternally grateful.
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