Analytic firm GfK has published statistics on the commercial side of the global smartphone industry which prove that the prices of smartphones are indeed on the rise. The study also provided data pointing towards growing African and Latin American markets, and a slight decline in the North American one.
https://www.notebookcheck.net/The-average-smartphone-will-cost-you-7-more-than-it-did-last-year-study-shows.260004.0.html