Try again and play music this time.
By defaut headset icon is disabled, you can enable it from System UI tuner in RR CONFIGURATIONS.
Have you tried playing music or just came to the decision due to missing icon in statusbar?I have tried 2 different earphones, none of them were working
And using a311
By defaut headset icon is disabled, you can enable it from System UI tuner in RR CONFIGURATIONS.

