Logged out*
  Enter Phone Number -> Try Send SMS

Logged in
  Sign out -> Logged out
  Debt
    Create Debt
      Debt Details Input
        Check Borrower Phone Number -> Try Send SMS
      Borrower Confirm Debt Page
        yes -> Confirmed Debt
    Confirmed Debt
    Returned Debt
    
SMS
  Try Send SMS
    Check SMS Gateway -> SMS Gateway Available?
  OTP SMS Sent
    OTP Password entered -> Logged in
    3 minute passed -> OTP Password invalidated
  OTP Password invalidated
    New OTP Generated
      Retry OTP -> OTP SMS Sent
      Send OTP to New Number -> OTP SMS Sent
      Sent OTP 10 times to same number -> Number Error
  Link SMS Sent
    Link followed -> Borrower Confirm Debt Page
    3 minute passed -> Retry Link SMS again
  Retry Link SMS again
    Retry Link SMS -> Link SMS Sent
    Send Link to New Number -> Link SMS Sent
  Sent Link SMS 10 times to same number -> Number Error
  
  
SMS Gateway Available?
  API Error -> API Unavailable?    
  API OK -> SMS Gateway OK
SMS Gateway OK 
  Send OTP -> OTP SMS Sent
  Send Link SMS -> Link SMS Sent
API Unavailable?
  Try again OTP -> OTP SMS Sent
  Ty again Link SMS -> Link SMS Sent
  Tried 5 times? -> API Error Exception

API Error Exception
Number Error