Why can't Unicom send short messages abroad?

If your number doesn't have international roaming service, you won't be able to use calls, text messages and traffic normally abroad.

Open international business through online business hall > handling > international business handling > international, Hong Kong, Macao and Taiwan roaming self-service handling, subject to the actual page prompts;

In China, you can call 100 10 customer service hotline for consultation and opening;

Foreign countries can call+8618618610010 international customer service hotline for consultation and opening.