You have to click forget password. Then keep pressing "Try another way" until you see "Choose how you want to sign in:" Then select "Get a verification code" It should text the code to telephone number linked on the new cell phone.
After signing in on the new phone with the new password, you will have to do the same thing. Press try another way until you see send a verification code to your phone number. Then it will text a code to the new phone.
You're also welcome to call me and I will try to help you over the phone.