iPhone 4S WiFi problem - GSM-Forum

balzakhaar123 · 01-27-2015, 16:39

Hello,

I'm buying iPhones to repair them and sell them again.

I bought an iPhone 4S with a greyed out WiFi and I always reflow the IC and it always works, but this one didn't even had an IC on it.

It is having some damaged pads where the WiFi IC sits, but I don't know if it can be even resolved?

Putting a new IC on it didn't work and it is still greyed out.

Please help

Kind Regards

makabress · 01-27-2015, 17:42

Do you have photo to see the damaged pads , how many pads are removed

balzakhaar123 · 01-27-2015, 18:49

ughh I can't upload a photo because of my postcount -,-

But it is missing about 10 small pads

They are all on the side, the middel ones are still preserved

Hoping it can be fixed :/

makabress · 01-27-2015, 21:26

If you never did it this will be hard to do , and for 10 pads it's hard any way and will take a long time

So you can serch in the internet to find and bay a silver based epoxy , use it to replace missing part

But before you have to scratch carffuly the pcb were the pads are missin until you see the copper link

My advise is sell the phone as only 3g working , no wifi

balzakhaar123 · 01-28-2015, 11:24

Ughh here in my country you get nothing from a iPhone with no WiFi

I think I'll just try to fix it.

Can you recommand any products or techniques?

Do I have to scratch until I see copper and then put some silver based epoxy on it?

foxik33 · 01-28-2015, 15:02

makabress · 01-28-2015, 21:27

Yes but real carffuly , search and you will find how to repair missing pads

And i have no recommand product

balzakhaar123 · 01-29-2015, 11:09

I scratched most of the pads and you can now see the copper.

But some pads also have the copper layer removed?

Because I don't see them

Is it possible to have WiFi without some pads or are ALL pads required?

gsm_anwar · 01-29-2015, 15:30

DEAR
iPhone 4S wifi and Bluetooth solution sucesfull.

first tri slowle rehot 2minit wifi ic 10 minit after cheak 100% working teasted me.

gsm_anwar

balzakhaar123 · 01-29-2015, 17:44

Quote:

Originally Posted by gsm_anwar

DEAR
iPhone 4S wifi and Bluetooth solution sucesfull.

first tri slowle rehot 2minit wifi ic 10 minit after cheak 100% working teasted me.

gsm_anwar

Yes I know that works, but please look carefully to my question and maybe you'll understand it

makabress · 01-29-2015, 18:32

use the schematic of the 4S to know whiche pad is important , look to U1_rf compare the 60 pin to the schematic and you will find

balzakhaar123 · 01-31-2015, 20:36

are the one with a colour in the schematics the important one?

makabress · 02-02-2015, 02:01

gold color is important , if you have the schematic with gold and grey

balzakhaar123 · 02-05-2015, 22:45

Yes almost all the missing pads happen to be gold ones -.-

I think I just give up

mb83 · 02-06-2015, 00:35

Waste of time... 10 pads it is suicide

it takes to much time to repair and you dont have any warranty that it will work when you put ic on it... Try to sell withou wifi and buy another one. I've tried to restore 3 pads but everytime after i put ic it wont work...

01-27-2015, 16:39	#1 (permalink)
balzakhaar123 Junior Member Join Date: Dec 2014 Posts: 35 Member: 2311002 Status: Offline Thanks Meter: 4	iPhone 4S WiFi problem Hello, I'm buying iPhones to repair them and sell them again. I bought an iPhone 4S with a greyed out WiFi and I always reflow the IC and it always works, but this one didn't even had an IC on it. It is having some damaged pads where the WiFi IC sits, but I don't know if it can be even resolved? Putting a new IC on it didn't work and it is still greyed out. Please help Kind Regards

01-29-2015, 15:30	#9 (permalink)
gsm_anwar Freak Poster Join Date: Jun 2012 Location: Bd+Bh Age: 39 Posts: 464 Member: 1775502 Status: Offline Sonork: 100.1618378 Thanks Meter: 221	iPhone 4S wifi and Bluetooth solution sucesfull DEAR iPhone 4S wifi and Bluetooth solution sucesfull. first tri slowle rehot 2minit wifi ic 10 minit after cheak 100% working teasted me. gsm_anwar

01-27-2015, 17:42	#2 (permalink)
makabress Freak Poster Join Date: Dec 2012 Posts: 107 Member: 1849962 Status: Offline Thanks Meter: 15	Do you have photo to see the damaged pads , how many pads are removed

01-27-2015, 18:49	#3 (permalink)
balzakhaar123 Junior Member Join Date: Dec 2014 Posts: 35 Member: 2311002 Status: Offline Thanks Meter: 4	ughh I can't upload a photo because of my postcount -,- But it is missing about 10 small pads They are all on the side, the middel ones are still preserved Hoping it can be fixed :/

01-27-2015, 21:26	#4 (permalink)
makabress Freak Poster Join Date: Dec 2012 Posts: 107 Member: 1849962 Status: Offline Thanks Meter: 15	If you never did it this will be hard to do , and for 10 pads it's hard any way and will take a long time So you can serch in the internet to find and bay a silver based epoxy , use it to replace missing part But before you have to scratch carffuly the pcb were the pads are missin until you see the copper link My advise is sell the phone as only 3g working , no wifi

01-28-2015, 11:24	#5 (permalink)
balzakhaar123 Junior Member Join Date: Dec 2014 Posts: 35 Member: 2311002 Status: Offline Thanks Meter: 4	Ughh here in my country you get nothing from a iPhone with no WiFi I think I'll just try to fix it. Can you recommand any products or techniques? Do I have to scratch until I see copper and then put some silver based epoxy on it?

01-28-2015, 15:02	#6 (permalink)
foxik33 Junior Member Join Date: May 2011 Location: Szydlowiec/Poland Age: 33 Posts: 26 Member: 1572890 Status: Offline Thanks Meter: 4

01-28-2015, 21:27	#7 (permalink)
makabress Freak Poster Join Date: Dec 2012 Posts: 107 Member: 1849962 Status: Offline Thanks Meter: 15	Yes but real carffuly , search and you will find how to repair missing pads And i have no recommand product

01-29-2015, 11:09	#8 (permalink)
balzakhaar123 Junior Member Join Date: Dec 2014 Posts: 35 Member: 2311002 Status: Offline Thanks Meter: 4	I scratched most of the pads and you can now see the copper. But some pads also have the copper layer removed? Because I don't see them Is it possible to have WiFi without some pads or are ALL pads required?

01-29-2015, 18:32	#11 (permalink)
makabress Freak Poster Join Date: Dec 2012 Posts: 107 Member: 1849962 Status: Offline Thanks Meter: 15	use the schematic of the 4S to know whiche pad is important , look to U1_rf compare the 60 pin to the schematic and you will find

01-31-2015, 20:36	#12 (permalink)
balzakhaar123 Junior Member Join Date: Dec 2014 Posts: 35 Member: 2311002 Status: Offline Thanks Meter: 4	are the one with a colour in the schematics the important one?

02-02-2015, 02:01	#13 (permalink)
makabress Freak Poster Join Date: Dec 2012 Posts: 107 Member: 1849962 Status: Offline Thanks Meter: 15	gold color is important , if you have the schematic with gold and grey

02-05-2015, 22:45	#14 (permalink)
balzakhaar123 Junior Member Join Date: Dec 2014 Posts: 35 Member: 2311002 Status: Offline Thanks Meter: 4	Yes almost all the missing pads happen to be gold ones -.- I think I just give up

02-06-2015, 00:35	#15 (permalink)
mb83 Freak Poster Join Date: Jun 2014 Posts: 400 Member: 2205919 Status: Offline Thanks Meter: 33	Waste of time... 10 pads it is suicide it takes to much time to repair and you dont have any warranty that it will work when you put ic on it... Try to sell withou wifi and buy another one. I've tried to restore 3 pads but everytime after i put ic it wont work...