If you register your phone number in one account, it cannot be used for other accounts.
As you know, we only allow one account per person, if we detect that you have more than one account, we will block all of them.
Additionally, we have added a new rule. For "Say it in your own words" tasks and "Repeat out loud" tasks, we only allow one phone number per account, for example:
If before you and a friend had the same phone number on both accounts to complete "Say it out loud" tasks, either because your mobile had broken or one of you did not have a mobile, now it is no longer possible.
Based on the example, now you must have a number in your account and your friend must have a different number.