Discovering DHCP hostname during original system installation

[Richard Owlett <rowlett@cloud85.net>]

I'm using firmware-11.3.0-amd64-netinst.iso to install Debian onto a 
Lenovo T510 [Thinkpad].

I know the netinstaller works on this laptop as I have done a successful 
install when within range of of local library's wifi and the installer 
is successfully detecting multiple local wifi sources.

I am doing a fresh install from home using an Alcatel Linkzone to 
connect to my T-mobile account. I have had no problems doing this with 
standard netinstallers.

After an install over library wifi the system had no problem connecting 
to the internet via the Linkzone.

Help please.
TIA