This is what Apple will do when the iPhone 6s launches.
iPhone 6s (+) wil have 16gb, 64 Gb and 128 Gb models for the current iPhone 6 prices.
16 gb 6s for $649 /$749 6s+
64 gb 6s for $749/$849 6s+
128 gb 6s for $ 849/$949 6s+
The "old" iPhone 6 after the launch of the 6s.
16gb 6 for $599 /$699 6+
New 32 Gb : 6 for $649/$ 749 6+
64 Gb 6 for 699(or discontinued)/$799 6+
128 Gb 6 for $799(or discontinued)/ $899 6+
iPhone 5s ( discontinued after introduction 6c?)
New 8gb for $449
16gb for $499
iPhone 5c(discontinued in Europe/us??, available in India , etc)
8gb for $379-399
iPhone 6s (+) wil have 16gb, 64 Gb and 128 Gb models for the current iPhone 6 prices.
16 gb 6s for $649 /$749 6s+
64 gb 6s for $749/$849 6s+
128 gb 6s for $ 849/$949 6s+
The "old" iPhone 6 after the launch of the 6s.
16gb 6 for $599 /$699 6+
New 32 Gb : 6 for $649/$ 749 6+
64 Gb 6 for 699(or discontinued)/$799 6+
128 Gb 6 for $799(or discontinued)/ $899 6+
iPhone 5s ( discontinued after introduction 6c?)
New 8gb for $449
16gb for $499
iPhone 5c(discontinued in Europe/us??, available in India , etc)
8gb for $379-399