[Hardware Hacking General] showlyshah:
Hey guys remember those old days(and new days too..), most of us had a Nokia handset( i never had used one from multimedia days, i hate Nokia multimedia sets,and i am a fan of Sony Ericsson, but of course i love Nokia's monochrome handsets,coz they come handy as a backup set!) Before theses android phones came to us.. so of course we do have a headset ( some even have in ear too like wh205 or so) which we do put a side coz its no longer being useful to the owners of HTC or Samsung users..( don't know if it works for other android devices).

Here starts my story.. i have been in search of a headset with mic for my hd2, i lost my HTC and Samsung headsets coz its cables brick in such a manner that i cant fix it any more( already had fixed it lot of times.. oh lol my crazy sleep with headsets on make it broke all the time..). So i need a good pair of headsets( i already had a lot of music only headsets from Sony, jbl,etc..) with mic,my needs are- it should have a good quality cable,good 3.5mm jack, good mic,and of course descent music quality. After long search i fall into Nokia headsets . Its almost good for enough and satisfies my needs..

So first time in my life i bought a Nokia accessory ,a wh205 headset ( cost me 350 Inr from Nokia showroom , almost 7 USD), well i checked it in my friends Nokias.. its good.( almost.., Worth the cost of course. Believe me, far better than default HTC or Samsung headsets ).

But there exists a problem, this is not compatible with HTC OR SAMSUNG( fck lol!!!!) So only after an hour of purchase( 6months warranty is still there) i dismantled it, opened the mic container, and find out the pin points of the jack and identified the wires of L+,R+,L-,R-,M+,M- using my multimeter and rewired( resoldered) them according to this wiring diagram .

Re fitted everything carefully ( thanks to Nokia, they use only locks and not glue to join parts, hence i can refit every thing perfectly) as how its made! Not even a scratch!( used a small needle and sharp cutter blade with extreme care to open it... lol i need the warranty in any case he he...) . And checked in my hd2 with music,calls,music controls( single button control), every thing is fine, and the music is perfect, a lil low treble , medium bass but decent warm mids( when compared to my dedicated music only headsets.. but its perfect heaven for a lazy listener. And is better than HTC or Samsung's in ears that comes with phones ( lol don't compare with beats or other premium packs..). It took me only 5 min to do all, its worth a lot.

So if u are not an audiophile ( or i don't think audiophile premiums come with mic, do they??) U must go for this mod, its worth it.

Fact:- wh205 is the basic in ear from Nokia, and i would say it beats other headsets around 10-20 usd in its neighborhood.

I haven't changed any component from the circuit ,just rewired it, that does the trick..i will upload some pics of wiring if any one needs it

http://db.tt/f564yI0y

The above pic is the original one.

Wiring to pin end:-

Right- red wire

Right ground - red blue wire

Left ground - blue wire

Left - green wire

Mic + - white wire

Mic - - copper wire

Wiring to speaker end:-

Left + - green wire

Right + - red wire

Left - - copper wire

Right - - blue wire.

http://db.tt/7PSS1itp

And this is the modified one

Wiring to pin end:-

Right - red wire

Left - green wire

Mic + - copper wire( previously it was mic- wire)

Left ground - no connection( just dont connect the blue wire to any thing)

Right ground & mic - - short circuit the right ground( marked as GR on pcb) and the mic - ( marked as M- on pcb) and connect to the white wire( previously it was mic+ wire).

Lastly you will get a spare wire , the blue red wire ( previously it was right ground wire ) , it will be connected to nothing. ie. There will be two wires in total ( blue and red blue) which does not connect to any points.

Wiring to speaker end:-

Left + - green

Right + - red

Left - & Right - - short circuit both points and connect it to copper & blue wires ( previously both served as grounds to respective channels)

Nb :- I will give u a small audio tip, the headphone speakers can work in either polarities , ie , if u swapped there respective positive and negatives , it will be ok. But if u have swapped any one channel's negative and positive while keeping the other channel's in its original position , it can result in lowering the volume( Google for reason , i m too lazy to type the fact behind it from my xda app :o ) which is noticeable. So take care of polarity.

Thanks

Showlyshah..