Nobody localizes unless there is any carrot & stick incentive from the GoI.
Micromax, Lava etc were kings of the market once, till their Chini suppliers stepped into the ring and started selling themselves

NOW after flopping and surviving somehow the Micromax and Lava walas find some success in being ESDM companies.
Micromax wala could have started an assembly plant but he blew his money on signing Hugh Jackman for their shitty ads
Chinkies themselves have factories here because Govt arm-twisted their precious margins by applying 20% duty on CBU imports and eventually certain subcomponents also
Also 80-90% localization is utter bullshit from the chinky phone vendors, we don't have any fabs, no OSAT plant in production or display fabs, or any battery cell or assembly plants here, those items are the bulk of the BOM in terms of cost.
I fully support Jai Jagganath in his deserved RR vs that Chinectra and their 2rs assembly scam.
GoI also needs to push out a comprehensive EV policy like the chinkchongs did, not just some PLI .