Is roaming free in Vietnam with my US or Australian SIM card?

It's highly unlikely that you'll have free roaming in Vietnam with a US or Australian SIM card. Most carriers from these regions consider Vietnam an international destination outside their standard roaming zones. This means you'll almost certainly incur significant daily or per-MB charges for data, calls, and texts, which can quickly add up. These costs can be surprisingly high, especially if you're frequently checking maps in Ho Chi Minh City or sharing photos from Hanoi. EastESIM provides a cost-effective alternative, offering transparent, affordable data plans specifically for Vietnam, saving you from unexpected roaming fees.