You do not have to dismantle or take anything apart in this video. If you have problems with your headphones, earphones, or earbuds, in one device but then if you plug them into another device and it works perfectly then you may have a build up of debris, lint, fluff, dirt, or even a mixture of debris with stained coffee, soda, etc in your headphone jack.
Your headphones may only work on one side, randomly change sides, or cuts in and out. I show you how to get the debris out. Make sure have a brush toothpick like this one: http://amzn.to/28ZUTfO
Make sure the bristle is hard and not soft or it will not work. You should be able to get these or something similar at CVS, Walgreens, Rite Aid, etc.
You can also use a pipe cleaner with hard bristle such as this one: http://amzn.to/2980Wwi
I assume no responsibility of damaged or broken phones so do at your own risk!
Let me know if you have any questions. thx.