Change permissions and new policy with phone number


Dear Support Team,
I just created a new app I want to use to post tweet on my tweeter account. The thing is when I try to change the permission from read to read & write, it says that I have to add my phone number to my twitter account but when I try, it says that it’s not available for my country (France)

so how can I add my phone number ?

thanks for your help



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