Welcome to the board. welcome
Your request goes beyond the purpose of the forum which is to provide help with user and admin level programming.
You could cause yourself a lot of headaches by plugging phones in different jacks. Plugging in different Samsung phones where Samsung phones are currently connected may cause the programming of the buttons to default. Plugging in Samsung phones where non-Samsung phones are connected could cause damage to the phone.
You need to find a qualified technician to help with this project.