[vkmr]

I bought 23rd January on the same day I heard there is no windows 10 update for Lumia 730. Is this true?

[Athull]

All of that Is false information.
All the lumias in the current line up is guaranteed to get W10

[xandros9]

All of that Is false information.
All the lumias in the current line up is guaranteed to get W10

EXCEPT for when carriers decide not to release an update. Example: The 810 which T-Mobile US has blocked updates for.
HOWEVER, the Preview program has been an easy workaround, you're missing the firmware updates though.

[Conan143]

I assume OP is in India if so u will get it as soon as MS releases it . If not u have wait for carriers to start the roll out .

[Athull]

EXCEPT for when carriers decide not to release an update. Example: The 810 which T-Mobile US has blocked updates for.
HOWEVER, the Preview program has been an easy workaround, you're missing the firmware updates though.

Yes, but the OP is potentially from India or one of the neighboring countries and as u said everyone can still get W10 sans the firmware anyway.