Whatsapp can't send verification SMS.

Whatsapp cannot send verification SMS because it is blocked by mobile phone security software.

Solution: Find and close the SMS interception software in the mobile phone, and restart the mobile phone. Reopen WhatsApp and accept SMS verification again.

Whatsapp can't send verification SMS. It may be because the contact you want to send a message may block you. WhatsApp sent a message that the past phone number was not correctly stored on the mobile phone. Or because of the whatsapp version problem, we download the latest version of whatsapp on the whatsapp website or Google Store and resend it.

Introduction to WhatsApp

WhatsApp Messenger (WhatsApp for short) is an application for communication between smart phones, which supports iPhone and Android phones. With the help of push notification service, this application can immediately receive messages sent by friends, relatives and colleagues. You can switch from sending SMS to using WhatsApp to send and receive information, pictures, audio files and video information for free.

WhatsApp is registered based on mobile phone number. When registering, users need to enter their mobile phone numbers and receive verification messages. Then WhatsApp will search for people who are already in use in the user's mobile phone contacts and automatically add them to the user's mobile phone contact list.

Reference to the above content: Baidu Encyclopedia -—WhatsApp Messenger