Alipay's recharge verification code was sent to my mobile phone. Why can't I receive the verification code?

Dear, the failure to receive the verification code may be a problem of the communication gateway, and the verification code has been delayed. Dear, you can try the following methods: 1. Turn off the phone 1-2 minutes; 2. At present, some firewalls of smart phones also have shielding function. You can take out the sim card and replace it with an ordinary mobile phone or a home mobile phone to receive short messages. If it doesn't work, please try again next time.