Hi, it sounds like the old DNS information might be cached on your computer but not on your phone. This can happen if you visited the domain on your computer before hosting the website through nginx and it should clear up on its own in the next 24-48 hours.

Your phone is working because it is probably configured to use a different network (mobile) and/or DNS servers for accessing the most up to date information for that domain.

On your computer, you can try pinging the domain and comparing the IP address to the one for nginx.

Good luck!