For the Optimus-103 OLEDs have to be custom-made. We have to choose the manufacturer next week (there are some of them), define the specs and finance every production stage including the tooling. Tooling itself costs a minimum of US$70-100k. Production cycle takes at least three months. Every display costs about US$10. Multiply that by the number of active keys.

Read more here (Art.Lebedev blog) 

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