Mukesh Ambani brings down the price to fill Reliance JIO's $25B network. The time has come for all but the very poor to have LTE phones with speeds in the megabits and higher. LTE is 2x-5x more efficient and costs much less per bit than 3G. The parts cost is only $5-15 more than 3G; the operator more than makes up for that with OPEX and spectrum savings. Ambani's $45 LTE phone has a quad-core processor, 4" screen, and performance that matches the iPhones that made people happy a few years ago, For $20 more, the screen is 4.5". 5" inch models are about $100. The $45 model - pictured above - has cameras with only 2 megapixels and other limits For not that much more you can get better specs. JIO is probably subsidizing a bit but other brands are not that much more expensive.
Carlos Slim told me three years ago that $50 smartphones will bring billions to the net. He was right. There are now about 3.5B smartphones, more than half belonging to people who weren't connected a few years ago. GSMA, usually accurate, projects 5.8B smartphones by 2020. India alone will have 400M-600M new netizens, more than the U.S. plus much of Europe.
I predict a very high percentage will be LTE.