I don’t think that iPhone 7 is a upgrade of iPhone 6s. If you already have IPhone 6s so don’t go for upgrade your iPhone 6s to iPhone 7 because both are the same the differences in between these 2 smartphones is the price difference iPhone 6s 32gb varient price is 40, 000 and IPhone 7 32gb varient price is 60, 000. I show you what we got in 60, 000 rs. Upgrade compared to iPhone 6s.
1) OIS and the wide angle lens with the aperture of f/1.8 and 7mp Front camera.
2) IP 67 Dust and Water Proof Certification.
3) 1900 mah battery & stereo speakers.
4) A10 fusion Processor and Some changes in design.These are the list of some changes in iPhone 7 compared to iPhone 6s.
Conclusion- The changes in iPhone 7 features is not so big and good but changes in price is quite high.