back button not working in m30s

[NRAndhra]

From yesterday my phone back button is not responding...what to do 

[_ashiquek]

Bro please change the gesture in advanced features and settings

[Ehsank]

go to settings >general Management >reset>reset settings and then check

[NRAndhra]

tq

[cs-member13]

Dear Samsung Member,

Greetings from Samsung Customer Support!

We apologize for the inconvenience caused to you. We request you kindly visit the service center for the physical inspection of your device. To check for the nearest Samsung service center kindly click on the link:- https://www.samsung.com/in/support/service-center/

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support

[Hyder110zaidi]

don't recommend anyone for Samsung brand. its worst products, too much connectivity problem.