What should I do if my mobile phone (China Mobile) can't receive short messages abroad?

People are abroad, and the mobile phone number can't receive any short messages and verification codes. Your mobile phone has a sufficient balance at present. Yes 100 yuan. The mobile phone opened international roaming, also called the customer service phone of China Mobile, and restarted the international roaming phone and SMS functions. And mobile phone protection software such as mobile phone 360 guardian and Tencent mobile phone housekeeper has been uninstalled. There is no problem of false interception. And the phone has been restarted many times. But the problem still exists. Personally, I feel that this problem may be different from the mobile phone network standard and frequency band used in your country. You need to use a mobile phone that is more suitable for other countries' national conditions to use the international roaming function normally. It is also possible that your mobile phone is set to automatically connect to the Internet. But I didn't find the network of the operator who cooperated with China Mobile. You can try to select the net manually. You can ask the local Chinese community for help. They are more experienced.