User name
A Unique identification used by a person with access to a computer, network, or online service.
Roadmap:
Mobile view: S Landing page ~ 
B Sign up 
~ S Complete your details ~ S Verify your number ~ 
Terms and conditions ~S Filled in details ~ 
Terms and conditions ~ B Register
Website view: S Landing page > B Sign up > 
> S Complete your details > S Verify your number > Terms and conditions > S Filled in details > Terms and conditions > B Register
User manual link: Landing/Home page