I had trouble installing the eSIM on my Samsung Galaxy S22, but customer support was amazing. I contacted them via live chat at midnight, and they responded in less than 2 minutes! They walked me through the steps, and within 5 minutes, I was connected to 4G LTE. I didn't have to stress about data limits, and the connection was fast and stable everywhere in Vietnam, even in crowded areas like Hanoi and Danang.