Why can't the mobile phone receive the verification code when Weibo logs in?

The mobile phone number is in an expired or expired state. 2. The mobile phone is in flight mode and cannot accept SMS verification code. 3. Carrier network delay. 4. There was an error in the registration system of Sina Weibo, and the system did not issue the verification code. 5. There is an error in Sina Weibo's program, and there is no function to respond to the verification code. (1) Sina Weibo registered, and the mobile phone failed to receive the verification code, which would lead to the failure of Weibo's registration. (2) If you can't receive the verification code, you can try the following solutions: 1, and check whether the registered mobile phone number has expired or is in arrears. If yes, change to another mobile phone number to register. 2. Check whether the mobile phone is in flight mode. 3. Please keep your mobile phone online. 4. Call the operator to check whether the network is clear. If Sina Weibo system is being updated, please wait patiently. 5. Reinstall Sina Weibo program. 3. Sina Weibo: Sina Weibo is a platform where users can post messages or upload pictures through web pages, WAP pages, mobile phone clients, SMS and MMS. Sina can understand Weibo as "micro blog" or "one-word blog". Users can write what they see, hear and think in a sentence, or send a picture, and share it with friends anytime and anywhere through computers or mobile phones, and share the discussion together; You can also pay attention to your friends and see the information they post immediately.