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Could you elaborate?
Settings > apps > all > smartconnect > clear data
Which headphones do you have?
Since those headphones are 3 pin headphones you can select something similar on the list such as MH-EX300AP, but do contact your local Xperia Care regarding that.
http://support.sonymobile.com/global-en/contactUs/
My opinion, the headphones on the list are headphones that are made by Sony Mobile specifically for Xperia devices.
Anytime, keep in mind that you should look in to 5pin headphones if you want them to work with your Z3v