S21 ultra update problem

[jh-sujon]

My S21 ultra 12/128 snapdragon version

I didn't get any update even one ui 6 what's probelm with my device

By the way its Vietnam version I bought from someone he took it from UAE 

[cs_member10]

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your query, we want to inform you that in some cases regular OS upgrades may cause delays to planned beta version updates. The delivery time of the beta version may vary depending on the regions and models kindly contact your country helpline they will guide you with the exact information regarding this.

To reach country-specific Samsung support teams click on the below link:
https://www.samsung.com/country/

Warm Regards,
Samsung Customer Support