Receiving incoming calls in Vietnam with UK SIM

sanooku · 2020-11-19T11:36:25+01:00

Struggling to receive calls with a UK SIM in Vietnam? Share your experience and find troubleshooting tips from fellow travelers using three.co.uk.

sanooku Banned

Member since 15 November 2015

sanookuBanned19 November 2020 09:36:25

672

I've been using three.co.uk SIM to make and receive calls while roaming in Vietnam without any issues up to now. Since a few days ago, I've not been able to receive calls from anyone.

Can make calls without any issues and can send and receive SMS too.

Has anyone encountered a similar issue?

When I go to phone setting can see that I'm connected to Viettel network. The recorded message the caller hears is sometimes a British woman saying:

sorry it has not been possible to connect your call. Please try again later

Sometimes, a Vietnamese woman saying in Vietnamese:

then in English:

the subscriber you have called is not available at the moment.

edit: I've contacted three.co.uk support a聽 few times, but they've not been able to solve.

I used聽 three.co.uk SIM to call my local Viettel SIM number and this is fine. But the other way round I can hear either the British woman's recorded message or the Vietnamese woman's recorded message.