Headset standards: AHJ and OMTP

What is OMTP and AHJ?

AHJ and OMTP are pinout configurations for 3.5mm audio connectors. Your phone uses one or the other. Some phones can be configured for one or the other standards.

OMTP and AHJ headset jack standards

Which standard my phone uses?

If you have an iPhone or Android most likely your phone is AHJ.

However the best method to verify which headset jack standard your phone uses is the check the phone’s user manual.

If the user manual is not available, or does not contain the info, try a Google search for phone model.

  • For example, if you have a Lumia 1020 do a search for: “nokia lumia 1020 ahj”


Further reading:

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