Phone keeps Restarting

[fuuuu]

I bought this phone 1 month ago and it keeps restarting everytime. Please help me with this 

[smilysahul]

say your mobile name

[fuuuu]

a21s is my phone please give me some solution

[cs-member13]

Dear Samsung Member,

Greetings from Samsung Customer Support!

We would like to inform you that as you have tried all the steps, we request you kindly visit the service center as your device needs physical inspection. 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

[fuuuu]

a21s is my phone