DB201x
K750 => W800
K750 => W700
W700 => K750
W800 => K750

DB2020
K310 => W200
K320 => W200
K510 => W200
k610 => k530
K530 => W660
K550 => W610
K610 => W660
K618 => W660
K800 => K810
S500 => W580
T650 => K770
V630 => K610
V630 => W660
Z710 => W710

DB2000
شV600 => K600
V600 => K608
K600 => V600
K600 => K608
K608 => V600
K608 => K600

Smartphones
M600 => W950
w950 => m600
P1 => W960

Unsure or partially working

DB201x
W800 => W700
W750 => W700

DB2020
K550 => W660
K800 => W660
K810 => W660

Smartphones
W960 => P1 (should work but you need to find a way to flash it)

NOT working

DB201x
W810 => your mother in law

DB2020
K810 => W880
K800 => W880