Talk:Vietnam/@comment-14.192.214.173-20170218094213/@comment-24682153-20170221181853

Please read the article. There is no waiting time for registration as SIM cards are pre-activated and work from the start. But not legally registered SIMs can and will be switched off soon. So you don't actually know, if your SIM has been registered properly except you have done it.

In the airports they will sell you unregistered SIM cards as users have reported because they can only be registered at certain points like provider stores. The airport stalls don't have registration facilities. But you can buy a SIM there and when go are downtown do the registration in a store of the provider later.

All three sizes are available. Nano needs to be cut sometimes, but vendors know how to do it.