From Sami Fathi's "Apple Reportedly Set to Roll Out iPhone 5G Support in India in December" posted Tuesday on MacRumors:
Apple will add support for 5G on compatible iPhones for Indian carriers through a software update as soon as December, according to a source familiar with the matter who spoke to ET News.
According to the publication, Apple and the Indian carrier Airtel will meet this week to discuss why Apple's iPhones are not compatible with India's 5G networks. Apple is reportedly already testing 5G support on iPhones in Mumbai and New Delhi, with an update officially adding support possibly being rolled out in December, the report said, citing a source.
A separate report from Reuters says the Indian government is placing pressure on Apple and Samsung to adopt 5G support for their latest smartphones. Apple first added support for 5G with the iPhone 12 in 2020, and two years later, Indian iPhone customers are still unable to use the newer and faster network. On Wednesday, the Indian government, alongside executives from Apple, Samsung, and leading carriers in the country, will meet "to prioritize" adding support for 5G on the latest smartphones.
My take: The subtleties of various radio frequencies and technical implementation details are beyond me. But there must be people at Apple, Qualcomm and the Indian carriers who could sort this out in less than two months.