with the spectrum constraint, it will be challenging to take forward standalone mobile broadband. It may be conversions of fix-and-mobile network elements - is the way fwd

Yes but if we look at the fixed line infratsructure across India it is limited, particularly in rural areas and the so called last mile access. If you take the example of Australia even here in a wealthy well developed country over 7M high speed broadband connections are provided to provide rural areas broadband access over mobile infrastructure. Spectrum should be made available and reasonably priced to support Indian Government objectives in providing broadband everywhere.