Phone number All Questions
To change your Gmail phone number on a PC: Open a web browser and log in to Gmail. Select the photo of your account, located in the upper right corner of the screen. Select Google account. Select Personal information. Go to the Contact Information section and select Phone.
Now tap on the option named "Registration Confirmation". This option can be found under "My Account". Now select the previous device and choose the option to forget. If checked, the Snapchat history can forget the associated device, so you can log into Snapchat from any other phone without the need for a verification code.