Citing unnamed sources, the report said, Samsung has recently started developing key parts such as the display screen for the S9, almost six months ahead of the previous year's schedule. The report said the early development of the S9 is largely due to the strengthened quality control process after the Note fiasco last year. Even though it is too early to know the specifications, the report said, the S9 is likely to come in two variants -- 5.8- and 6.2-inch screen models -- the same with the S8 that will be launched on April 21. In the meantime, Samsung is also working on the bigger-screen Note 8 under the code name 'Great,' the report said. The phone is expected to feature the largest 6.32-inch screen for Samsung's premium lineup. It is rumored to have a fingerprint scanner on the bottom of the front screen as a virtual on-screen home button, a feature that was not adopted for the S8 due to technical issues.