What's wrong with not receiving qq verification code?

I haven't received SMS verification code for a long time, which may be caused by the following reasons: \x0d\ Reason 1. I got more than the limit \x0d\ Solution: I can only get the verification code 20 times a day. If it exceeds today's quantity, please try again tomorrow. \x0d\ Reason 2. The mobile phone business does not support \x0d\ solution: at present, all segments of the three major mobile operators in China have been supported. However, the mobile phone numbers in Tibet, Xinjiang, Hong Kong, Macao and Taiwan and overseas will be restricted by the mobile phone service operators, so it is impossible to handle mobile telephone service. I suggest you try to change another mobile phone number. \x0d\ Note: Some users with numbers \x0d\ are temporarily unable to receive short messages from third parties due to data interface changes. Please call Netease customer service hotline for consultation. \x0d\ Reason three. Mobile phone security software interception (for smartphone users who have installed security software) \x0d\ Solution: Open the mobile phone security software, temporarily turn off the interception function, and then try to obtain the verification code again. \x0d\ Reason four. Congestion or abnormality of SMS gateway \x0d\ Solution: Congestion or abnormality of SMS gateway will cause delay or loss of sent SMS, so it is recommended to try to get it later. \x0d\ Reason 5. Solution: Due to the business reasons of the mobile phone service operator, the mobile phone cannot receive the verification code when it is used overseas or used overseas, so it is recommended to replace the mobile phone as much as possible. \x0d\ Cause VI。 People around you can use it normally, but they still can't receive \x0d\ Solution: It may be due to the mobile phone itself. It is recommended to change the mobile phone card to someone else's mobile phone and try again.