Response codes for common states are below:
Return Send OK string contains:
HTTP/1.1 200 OK
Connection: Keep-Alive
Content-type: text/plain;charset=utf-8
Keep-Alive: timeout=20
Transfer-Encoding: chunked
OK
Return Invalid Mobile Number string contains:
HTTP/1.1 200 OK
Connection: Keep-Alive
Content-type: text/plain;charset=utf-8
Keep-Alive: timeout=20
Transfer-Encoding: chunked
wrong number
Return Authentication Failed String contains:
HTTP/1.1 200 OK
Connection: Keep-Alive
Content-type: text/plain;charset=utf-8
Keep-Alive: timeout=20
Transfer-Encoding: chunked
Bad username or password