Re: It worked for phones
"but a country the size of India and that can easily compete with China in manufacturing cost"
In theory, not in practice. China addressed the problem by using the power of the CCP to push through all the changes needed to improve infrastructure (power, telecoms, roads, railways). Where China doesn't even pretend to be a democracy the state could dictate that roads, warehouses, ports, power lines etc would be built, and the state would print the money to make it happen. A bottleneck on construction materials? Just tell a state owned enterprise to build a new steel works or cement factory. A shortage of workers, just move some people in. China used whatever means suited to ensure that development did happen as required - clear away housing for a new rail link or port? Job done. Complainers and nimbys? No we didn't see any. Environmental activists? What are those? As an example result, the pearl River Delta is rapidly growing in the direction of a single city with a population around 85m.
In the whole history of trade across the world, import tariffs have been ineffective as a long term means of improving the economy of the importer - all it does is encourage inefficiency, retaliation, and higher costs. If they are serious. India needs to (1) achieve a step change on infrastructure, but the poor performance on roads, railways, water and power so far doesn't bode well. If they can start to get infrastructure resolved they then need (2) to differentiate against China on human rights, geo-political reliability, and openness to two way trade. And finally, they need (3) to address the sclerotic bureaucracy and corruption that are both endemic across India.
Can anybody here see that happening? I can't, and that's a shame for the world's largest democracy.