So, no more Redmi Notes eh? The Redmi 5 Plus should clearly have been the Note 5, a successor of the Redmi Note 4, but Xiaomi wanted a fresh start. The fifth generation is trying to shake things up and the new look obviously called for a new name. So, Xiaomi retired the Note brand promoting the Plus from a mere qualifier to a proper name. The phablet lives on regardless, and goes all-in with a wide 6" screen.
Source: https://www.gsmarena.com/xiaomi_redmi_5_plus-review-1713.php
