WLL internet connection at 115 kbps

Some of the I.S.P.s in India have just started providing 115 kbps
Internet connections with WLL. The Telephone cum Internet Service
Provider plans to provide an LG Electronics Telephone Instrument
which obviously incorporates a modem, provided by them. The Sales
and Marketing people cannot specify what modem is there inside the
instrument. With 56 kbps modems, I have had to download new drivers
every time I migated from Windows 98 to ME to XP. If one doesn't
know the manufacturer of the modem, does one have to wait for the
manufacturer to provide a new driver when the time comees to migrate
to longhorn or Linux?

Is this the common pracice all over the world? Or can one select the
best available instrument and the best modem in the market? If YES,
which is the best external or internal modem for 115 kbps WLL link?
Are there any reviews of modems of this type?

Any references to the web-sites which provide information on WLL
connections and the DOs and DON'Ts of it would be highly appreciated.

P. Jayant