Based on what's typical for this device — confirm on the label to be sure.
Typical profile: Your iPhone charger can work in Vietnam if its actual input rating, frequency and plug match the local supply.
Conditional compatibility
Use directly only if your actual input rating covers the local voltage and frequency and your plug fits with any required grounding. A typical category profile does not confirm your own unit.
Use directly only if your actual input rating covers the local voltage and frequency and your plug fits with any required grounding. A typical category profile does not confirm your own unit. Apple documents 100–240V, 50–60Hz for its USB adapters. Check the actual adapter and phone model requirements; third-party products are not verified by Apple specifications. Listed output watts do not measure AC draw or establish the complete range of compatible adapters.
Vietnam runs 220V / 50Hz. Vietnam runs 220V at 50Hz with sockets that commonly accept both Type A (US flat blades) and Type C (Europlug). The Type A fit is a trap: the plug goes in, but a US single-voltage device receives 220V and can overheat. Pack a Type C adapter and confirm your devices are dual-voltage.
Typical profile: Your iPhone charger can work in Vietnam if its actual input rating, frequency and plug match the local supply. Vietnam runs 220V / 50Hz on Type A/C sockets.
Will a travel adapter let me use my iPhone charger in Vietnam?
Typical profile: Vietnam sockets use Type A/C. Your plug already fits, so no adapter is needed.
Do I need a voltage converter for a iPhone charger in Vietnam?
Typical profile: No. If your iPhone charger is dual-voltage (100–240V), you don't need a converter in Vietnam.
Guidance only — not professional electrical advice. Always confirm against your device's label before plugging in. Local wiring (especially in hotels and older buildings) can vary.