Viet Nam Sim card

I want to buy sim travel in vietnam. Do you know the website selling prestige of Vietnam? please tell me. thank you

Hi,
Not clear on the prestige of Vietnam?

You want to purchase some Sim card with 3G or even 4G I suppose?
At the airport you can do that, or there are plenty of shops on the street selling sim card.
Mobifone, Vinaphone, Viettel,...
They will usually take care of everything for you, you just pay the sim card, top up, register for a package (Or not) and that's it.

If you want something more professional, most telecom companies got large commercial offices. For example, in HCMC, District 1, Mobifone have a large shop nearby the Intercontinental hotel. (Some of the staff speak english, you will take a ticket and they will help you)

Anything in particular you want to know?

I will be moving to Da Nang in June, my Vietnamese friend say Viettel is best, does anyone agree?

Tough to say...Not very transparent at the moment. We don't have surveys or even a map with the antenna.
But what is for sure, Viettel got the highest number of 4G stations. (But if connected poorly, it won't help, which I doubt anyway)