PAN2004 выкладывал соответствие прошивок P2K.
Добавил в его список ещё немного названий.

Модель - -- Прошивка --- Флекс
A630--- 37R--- GSDA
C250 --- R312 --- SE76
C330 --- TA02 - -- SE42
C350 --- c350 --- SE76
C350L --- R312 - -- SE76
C380 - -- R364/R365 - -- SE76/SE89
С390--- R368 --- SE89
C550 --- R321 --- SE43
C650 --- R364/R365 --- SE84/SE85/SE89/GSIC
E365 --- T66E - -- FlexT66E
E380 --- E380 --- ?
E398 --- R372 --- SE73
T720 --- T720 - -- SE41
T722i --- T720PM - -- T720PM
V150 --- V150 --- SE75
V180 --- R365--- SE75/SE52
V220 --- R364/R365 --- SE85
V3 --- R364?/R374 --- SE86/GSMV3
V300 --- Triplets --- SE65/GS9V300 ?
V500 --- Triplets - -- SE74
V535 --- R376 --- SE51
V551 --- R47 --- SE51
V60 --- PHX4 --- SE35
V60i --- PHX8 --- SE39
V600 --- Triplets --- SE64/GS9V600 ?
V620 --- R376 - -- SE51
V630--- Triplet --- GSDA630 ?
V635 - -- R474 - -- SE51
V66 - -- SAP4 - -- SE33
V66i - -- SAP8 - -- SE39
V70 - -- V708 - -- SE37
V80 - -- R37 - -- SE58/GSFV80
V330--- R472--- GSPV330/SE74