Mikapadia :
I had cut down the orignal jack by the end of the tip. now how should i check?...
Then there's only one person to blame
😉
Is there piece of the cable still available on the jack? You can try to peel off the plastic to see which color goes where.
You might still try to guess the colors with the ohmmeter. Make a five-rows -by- five-columns table, put color names across and down, and measure resistance of all possible wire combinations. From there, you should be able to figure out which wire is the common, which two wires goes to the headphones, and remaining wire should be the mike. You will also hear a "pop" in the headphones when you probe their pair of wires.