The sim is stable, quick activation, saves installation time, network, full 5 bars of 5G, can be turned on all day and used for 4 days without any worries.
Anyone who uses an iPhone should note that if you are also using an iPhone in Vietnam, and if you use an esim, it is best to buy a hard sim because you have to turn off 1 esim, and of course the esim in Vietnam must be turned off, causing loss of contact in Vietnam. A small note so that everyone is not surprised