Two M-Series phones are in works. Those are leaked to be the M31s and M51. M51 is confirmed with SD730 by a new Geekbench listing. Both are rumored to have 128GB internal storage and 64MP(Main) Quad Camera, other specs imo will be similar to other M-Series Smartphones.
M40 had SD675 but it was not a perfect phone that's why didn't sell that much. Lets see if M51 gets a Super AMOLED and a big Battery(atleast 5000MAh) or not coz those were missing on M40.
