Say for example I have these headphones with microphone - https://www.amazon.com/2019-Stereo-Headphones-Samsung-Galaxy/dp/B07TWB1R8B/
How do I know if the headphone jack is OMTP or CTIA?
And which of the two standards is more common for the modern headphones with mic? Should I buy OMTP or CTIA?
In general, telephones work with both OMTP and CTIA headphones, or with just one of them? Are there any telephones that support both types of headphones?