China Mobile's number+dual-band domestic mobile phone, can I send a text message to my family after I bring it to Canada? Do you need to open international roaming service?

When visiting China Mobile for international roaming, you can dial13800100186 to access the unified customer service hotline for international roaming. The dialing method is: roaming international prefix+8613800100186. For example, in Korea (international prefix 002), dial: 0028613800100186 on your mobile phone. When roaming in other countries, it is free to dial13800100186 with China Mobile, and the communication fee can be paid normally by dialing 13800 186 with other phones or methods.