Tab s9 back panel

[eswarsheshu]

After changing the back panel from authorized service center there are two dots on back panel. I didn't checked it properly while pick up. What might be the reason 

[cs_member10]

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your query, we request you kindly visit the service center again they will provide you the exact information regarding this and resolve your issue. You can locate your nearest service center with this given link: https://www.samsung.com/in/support/service-center/

Warm Regards,
Samsung Customer Support