Review on Sony MDREX15AP/B In-Ear Earbud Headphones with Mic - Black by Yoonki Baek ᠌

I bought these headphones for my old Lenovo S890, began to listen to music, the sound is very quiet, all the instruments merge into a mess, turned up the sound as much as possible, played with the equalizer, it was useless, connected them to a PC / laptop at home, the headphones began to play as needed, reconnected to the phone is the same, later I noticed that the microphone button for some reason amplifies the sound of the headphones, after these manipulations with the button, the sound in the right ear periodically began to disappear, later it stopped working at all, came to the technical service, explained the problem, the service worker connected them to his phone and lo and behold, the headphones played loud and clear, I asked him if it could be "That the phone does not pull them out due to the weak built-in sound," he said "no", the headphone jack is mini jack 3.5 mm, the phone says 3.5 mm, but that's what he is, I connected Sennheiser MX-170 to this phone, everything works perfectly, it's a shame