Does Zalo work in Vietnam?
Yes — works normally
Yes. Zalo works normally in Vietnam over mobile data — there is no China-style block. Just get online with a Vietnam eSIM and open the app as usual.
Detail: Vietnam’s own app — used by hotels, drivers and shops. Sign-up needs a phone number that can receive an SMS code.
Heads up: Zalo needs a Vietnamese phone number to receive its sign-in code (OTP). No prepaid tourist eSIM receives those codes — ours included. They only reach a Vietnamese line registered to an ID, so sign in before you travel if you can.
Using Zalo on a Vietnam eSIM
Install a Vietnam eSIM before you fly, set it as your data line on arrival, and open Zalo as normal. 5GB/day easily covers messaging, maps and video calls.
Get online in Vietnam
5GB/day from $8, direct from an authorized Viettel & Vinaphone dealer. The Vinaphone plan gives you a real +84 number for incoming calls and ordinary SMS — though not for app verification codes.
Checked for Vietnam, 2026. Apps work over mobile data unless noted; availability can change.