I forgot my mail password
I forgot my gmail password
and i formated my iphone
and changing my mobile number
iPhone 6s, iOS 15
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I forgot my gmail password
See: G-mail help -> https://support.google.com/mail/?hl=en#topic=7065107
and changing my mobile number
Sign in to your Apple ID account page and edit / update your Apple ID details.
-> edit your trusted phone number.
Click here for more support and assistance.