That's quite odd! Let's take a closer look at this.
Is this affecting multiple numbers or a specific one?
Is the number(s) registered on your device as a contact or you enter them manually?
In which country are the number(s) located?
Welcome to the community!
That's definitely strange! I understand using that calling format worked before (and it is the correct format), however, have you tried replacing the 011 with the plus symbol, +? The 011 is the International dialling prefix (IDP) for Canada.
The IDP is varies by country (see here). Since the IDPs vary by country, the International dialling prefix can be replaced by the plus symbol, +.
So the proper international calling and texting format is 011 followed by Country Calling Code followed by Area Code followed by phone number.
OR + followed by Country Calling Code followed by Area Code followed by phone number.
I'm not sure if it will make a difference, but it's worth a try.
Hope this helps
Hey there @Hans3!
This is definitely not normal, but I'm pretty sure we can narrow down what's going on.
Does calling other numbers from China specifically work on your device or is it just this specific number that doesn't work?
Keep us posted!