or use this one that I use for less than $10.
The reason plugging a 3.5mm output into a phone is because most phones nowadays use combi jack ports for using in-line mics on headphones.
Just a head's up - you can use these to split the the mic/headphones into separate inputs. Super cheap...I think $5 and primeable
I use that plugged into my PS4 controller w/an antlion modmic + sennheiser headphones