weak signal

[Bluetonic]

I have an office with no internet connection that is in a well constructed shed. I was planning on using my Samsung Galaxy S6 as a hot spot so I can connect to my laptop but unfortunately the mobile signal in the office is so weak it can't be done.

What are my best options here?

The main office that has a internet NBN connection is 80 - 100 metres away so I was also thinking could I boost the WiFi signal from there to my office?

Help!

[Jupiter]

Your best option is to run a Cat6 ethernet cable from the main office to the shed. Don't use Cat5e as it will be pushing it at 100m.

You could do a wifi connection, but it would require some special hardware (routers, yagi antennas) and a direct line of sight.