Why can't I receive the mobile phone verification code for WeChat registration?

What should I do if I don't receive a verification code when I register, bind, or retrieve my password? Tencent official gave this answer:

At present, WeChat supports the issuance of mobile phone verification codes in more than 100 countries and regions such as China, Hong Kong, Taiwan, the United States, South Korea and Japan. Some areas may be issued during the process. There will be a delay. It is recommended that you wait patiently or try again according to the following methods: 1. Please check the “Country and Region”; whether it is the right country or region where the mobile phone number belongs. For example, if the mobile phone is Hong Kong Mobile, you need to select “+852 Hong Kong  2. Please check if the mobile number is correct. For example, after selecting the attribution, just enter the mobile phone number input box. “9152****”, no need to enter other information such as area code; 3. If the above operation still fails to solve your problem, please send a letter to WeChat customer service email: [email protected] Send us your questions .