'iPhone 8' to come in three sizes, feature glass backs across the board - report
Apple is planning to launch next year's flagship iPhone in 4.7-, 5-, and 5.5-inch sizes, and will likely use glass backs for all three, a Japanese report claimed on Wednesday.

A concept render of an edge-to-edge iPhone display.
The company could still go back to the metal casings used on current iPhones, a source explained to Nikkei Asian Review, calling Apple's position on glass "tentative." The person added that Apple likewise decided to drop production of a single-lens 5.5-inch iPhone 7 just six months before the iPhone 7 Plus debuted in September.
Both the front and back glass will allegedly be supplied by Biel and Lens. The phone should still make some use of metal, namely a frame holding both sides together.
Foxconn and its subsidiaries have reportedly been working on glass backs, but are expected to lose out for technological reasons. That could impact the company's bottom line, since it also makes metal casings for the iPhone SE and iPhone 7 Plus, sharing regular iPhone 7 casing orders with Catcher and Jabil. Foxconn is, however, Apple's main assembly partner on the iPhone.
The 2017 iPhone is widely expected to be a major redesign. Nikkei has indicated that while the 5.5-inch model will have a curved OLED display, much like Samsung's Galaxy S7 Edge, the two smaller models may stick to the LTPS technology used on the iPhone 7.

A concept render of an edge-to-edge iPhone display.
The company could still go back to the metal casings used on current iPhones, a source explained to Nikkei Asian Review, calling Apple's position on glass "tentative." The person added that Apple likewise decided to drop production of a single-lens 5.5-inch iPhone 7 just six months before the iPhone 7 Plus debuted in September.
Both the front and back glass will allegedly be supplied by Biel and Lens. The phone should still make some use of metal, namely a frame holding both sides together.
Foxconn and its subsidiaries have reportedly been working on glass backs, but are expected to lose out for technological reasons. That could impact the company's bottom line, since it also makes metal casings for the iPhone SE and iPhone 7 Plus, sharing regular iPhone 7 casing orders with Catcher and Jabil. Foxconn is, however, Apple's main assembly partner on the iPhone.
The 2017 iPhone is widely expected to be a major redesign. Nikkei has indicated that while the 5.5-inch model will have a curved OLED display, much like Samsung's Galaxy S7 Edge, the two smaller models may stick to the LTPS technology used on the iPhone 7.

Comments
What a load of old bollox. I'd have more respect for these analysts if they would admit that they're guessing and that sometimes they get it wrong. Blaming their faulty analyses on mythical changes of direction just makes them look even more worthless than they actually are.
Of course, then we have reprogramming again to the different screens, like when they brought out the 5 (I think).
Ceramic may come eventually, but I think the cost of Watch Series 2 Edition shows that's probably, at least, several years away from having a low enough cost and being mass produced within a certain QA to be a viable solution.
* The formula for getting the length and width is using the known diagonal length and known aspect ratio with the Pythagorean Theorem: (9b/16)^2 + b^2 = c^2 or b = sqrt(256c^2/337). Or use one of the many online aspect ratio calculators.
Thankfully, Apple is not Samsung and hopefully will develop a product paying customers want no matter what the analysts say.