Problems with existing flow
Initially there is a choice of login/signup and second screen can be avoided by giving phone number text field right in the initial login screen
Region selection shall be included in the first signup itself
Too much white space in subsequent screen, this space can be utilized better
UI components seems quite old and doesn't feel interactive
Copies can be improved and placeholder can be better to improve UX
Taking last name is irrelevant and is not a must have or important information to know