I have provided wrong mobile number during Sign up. How can I correct it ?

I have provided wrong mobile number during Sign up. How can I correct it ?

Even if you have provided wrong/ incorrect mobile number, you need to login using the same mobile number to correct it. 

Login to Zoho Mail Control Panel using the incorrect mobile number with which you might have registered.
You will notice a link 'Click here' above the tab to provide the verification code to change your number. 
Select the correct country code and update the correct phone number. 
Click Send code to receive the confirmation code to updated mobile number you have provided. 

You can now proceed with confirmation and then follow the instructions to complete the Email Hosting for your domain. 
 
In case you do not remember the password or the mobile number provided during Sign up, please contact support@zohoaccounts.com with your domain details, to regain access to your account.