Introduction: Rewire Old Nokia Handsfree (WH-102 & WH-205) to Use It With Android Phones (OMTP to CTIA Rewiring)

Picture of Rewire Old Nokia Handsfree (WH-102 & WH-205) to Use It With Android Phones (OMTP to CTIA Rewiring)

Hi,

First i want to say sorry about my level of english.

So before a month ago i was bought an used Nexus 4 and was amased that the phones comes without headphones. After some research on the internet i found that i can use an old nokia handsfree after some basic rewiring.

I want to say they are two standard ot 3.5mm 4 pole jacks. One is called OMTP and the other that we need is CTIA. The only difference between this two standarts is that ground and mic pole are swaped.

Тhe tools that we need is:
1. Soldering iron

2. Soldering stand (optional)

3. Multimeter

4. Knife or some other slim tool

Step 1: Open the Handsfree

Picture of Open the Handsfree

This type of handsfree is closed with clips and it is easy to open and close. I'm using a knife for this, but if you have better solution suggest it.

Here is the internal of handsfree.

We have 5 cables coming from 3.5mm jack.

I will describe their function

WH-102 (Black)

  1. White wire - Mic+
  2. Gold wire - Mic GND
  3. Green wire - Left Headphone +
  4. Red/Green wire - Headphones ground
  5. Red wire - Right Headphone +

WH-205 (White)

  1. White wire - Mic+
  2. Gold wire - Mic GND
  3. Green wire - Left Headphone +
  4. Blue - Left Headphone GND
  5. Red/Green wire - RightHeadphone GND
  6. Red wire - Right Headphone +

We have another 4 cables, that are for the headphones (WH-102 & WH-205).

  1. Green - LEFT +
  2. Red/Green and Gold - GND
  3. Red - RIGHT +

Step 2: Multimeter - What Goes Where ?

Picture of Multimeter - What Goes Where ?

Use a multimeter to find witch cable to which pin is connected. I think there is no difference between all Nokia headsets, but this step is to verify the wiring.

Use а multimeter on circuit mode or resistance , attach first probe to jack (recommended is to use a crocodile) and with the second touch the cables soldering point on the board one by one, until you hear BEEP from multimeter or see 0 or something close to zero. Repeat this for every one of the jack pins.

Step 3: Rewire the Handsfree

Picture of Rewire the Handsfree

So practically we need to swap the microphone (Mic+) and GND wire, but it is not that simple. Because they are five cables for four pins there is two cables for the ground (one for mic and one for phones). After swapping the Mic+ and GND wire ( White and Gold), it is need to cut second GND cable(for WH-102 Red/Green, for WH-205 Blue and Red/Blue), because it is on your new Mic+ pin on jack and it makes short circuit, and make bridge between Red/Green(for WH-102) Blue,Red/Blue (for WH-205) soldering point and White wire and you are done with rewiring.

Note: In my picture the bridge is made directly from ground coming from jack to ground of headphones, because it is a little bit hard to make that small bridge, without touching near soldering points. It is no matter how it is done (WH-102 only)

In final configuration (CTIA) the cable are:

WH-102

  1. White Cable - GND (both mic and phones)
  2. Gold Cable - Mic +
  3. Green Cable - Left Headphone +
  4. Red/Green Cable - CUT/NOT USED
  5. Red Cable - Right Headphone +

WH-205

  1. White wire - Mic+
  2. Gold wire - Mic GND
  3. Green wire - Left Headphone +
  4. Red/blue wire - CUT/NOT USED
  5. Blue - CUT/NOT USED
  6. Red wire - Right Headphone +

Sorry for the missing picture of ready to use WH-205, but i lost it.

Step 4: Close Hands Free and Enjoy

Picture of Close Hands Free and Enjoy

You are done. On my Nexus 4 i can use it with all normal functions. Mic is working, key is work perfectly, so you can move between your tracks on music player, answering calls etc.

Thanks for seeing my FIRST Instrctables and sorry again for my bad english. I hope you understand everything

Cheers!

Comments

George244 made it! (author)2014-11-25

Thank you for manual.

I had no problem. I am adding clearer picture how it should look like :).
Working great.

George244 (author)George2442014-11-25

works also in a computer, after rewiring

OndřejK10 (author)2017-03-22

OR

buy OMTP to CTIA adapter

this type: https://www.aliexpress.com/item/1pcs-New-3-5mm-Male-Female-Audio-Transfer-Line-Adapter-Different-Headphones-CTIA-to-OMTP/32700957430.html

or this: https://www.aliexpress.com/item/High-quality-Rubber-Earphone-Converter-Adapter-convert-OMTP-to-CTIA-or-CTIA-to-OMTP-3-5mm/32503916321.html

UtkarshVerma (author)OndřejK102017-07-03

I made an adapter for this purpose so that no job has to be done on the headphones. Check it out:

https://www.instructables.com/id/Universal-Mini-OMTP-CTIA-Adapter-Convertendo/

UtkarshVerma (author)2017-07-03

I made an adapter for this purpose so that no job has to be done on the headphones. Check it out:

https://www.instructables.com/id/Universal-Mini-OMTP-CTIA-Adapter-Convertendo/

chafay2k (author)2017-01-14

Thanks for the tutorial, works great !!

haroon3377 (author)2015-12-10

I want to use this rewired WH-102 headset for Lumia 640XL. Will it work? Normally every headset which works with Android also works with Microsoft (Lumia) phones.

Plz suggest.

JuhaE1 made it! (author)haroon33772016-12-17

Hi

This worked fine. Mic & Button works well. One short extra wire needed.

Ring 3: White ( old ) is now Gnd. Extra cable needed to delivery same Gnd also to Mic.

Ring 4: New Mic is Blu/Copper. Now those two or either of them will work for Mic.

tanec (author)haroon33772016-01-11

Sorry for the late reply. If your Lumia can be used with any of Android headphones, maybe this will work with your Lumia. I can give you a suggestion to try with some Apple headphones and if they don't work, you can do this project :) Old Nokia headsets use the same standard of wiring like Apple headphones.

Sid Vicious (author)2016-11-21

So i Cut red-Green wire
Disconected White and gold
Attached White one one The place of gold and Green (on two pins)
Left gold and red-green wire unattached and it works perfectly but The speeker is not on use
So that is another way :)

studleylee (author)2016-06-24

Cool!!!

MisoB made it! (author)2016-04-07

I did it by your instructions. in Figure 1 below replacement of wires under 2 connect these two points. Headphones Nokia WH-102 and has a label HS125 and another set of numbers. At the Microsof Lumia 640 DS hear the call but can not receive a call button. The music I hear but can not change the track. Where did I go wrong?

tanec (author)MisoB2016-04-08

Hello MisoB,

It sounds like there is no GND for microphone. Could you check if the microphone on handsfree is working on phone call. If not, there is a big possibility to have a MIC GND issue.

MisoB made it! (author)tanec2016-04-19

I Made it for Microsoft Lumia 640DS

pliumbum made it! (author)2016-01-22

Functioneaza bine, multumesc.

sridhar.srinivasan.355 (author)2015-01-03

Dear Sir,

Rewired WH 205 as per ur instruction for HTC Desire. Now ok. But three issue

1 - When we insert the jack it is not showing the headphone symbol i.e with mic. After 4-5 times remove & insert process shows headphone with mic symbol.

What is the issue?

2. After getting the headphone with mic symbol music can be played but I cant change to the next song by pressing in the headphone.

3. In case there is a incoming call could'nt able attend from headphone or if we attend from phone itself we couldnt able to hear anything.

How to solve this above issue. Kindly update.

Sridhar.S

Try to check the soldiering point for microphone and button, may be it is bad contact at this point.

agulesin (author)2015-01-15

Thanks for this, I've got a Nokia earphone (WH-205) and want to use it with my Android phone so I was looking for the wiring details.

I've got a suggestion, some people might be interested so I'm sharing it.

Rather than modify the Nokia earphone, just make an adapter from a 4-pole 3.5mm plug and socket pair connected by a short wire - this would be ready to use whenever you need it and means you could use the same phones for both types of phone...

You could modify a ready-made adapter like this:

rchanter (author)2014-03-06

Very useful I plan to do this for myself and your English is fine far better than me at anything other than English.