I used the port 8080 and I still not getting the result. I was a bit confused on your second part of the note.
The screen shot 188.8.131.52 is from the 30 Day Trial Foundation Server.
Do I need to use this IP address on my phone? I was using the IP address from (ping dtudk.cloud.thingworx.com) which was mentioned in the tutorial?
Please let me know.