To ensure the security of your instances, some high-risk operations require text message verification. When you initiate this verification, a code is sent to the mobile phone linked to your Alibaba Cloud account. The high-risk operation is performed only after you enter the verification code.
The following high-risk operations require text message verification:
View and modify the linked mobile phone
Log on to the Account Center with your Alibaba Cloud account.
In the navigation pane on the left, click Account Security to view the linked mobile phone. Click Modify on the right to change the phone number.
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