a mi me sucede lo mismo que naxocs pero lo diferente es que a mi si me convirtio con exito el flasheo a k310@w200 pero al momento de regresarlo a k310 no me termina de flashear intente de todo(el archivo rest, esta,escribi el respaldo de GDFS con exito, la que le habia hecho anteriormente cuando vivia y lo volvi a flashear primero siguiendo los pasos para regresarlo a k310 y luego no fumo intente de k310@w200 y tampoco se me clava ,utilize todas las versiones del setool y nada me sale esto:
welcome to setool2 lite edition v 1.06
supported DB2010/DB2012 CID49, DB2020 CID49/CID51/CID52
Loaded 51 flash descriptors
ChipID:8040,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:49
Speed:921600
Flash ID check:2019
Flash props sent ok
OTP LOCKED:1 CID:49 PAF:1 IMEI:3515########7 CERT:RED
FLASH CID:49 COLOR:RED

MAPP CXC article: R4HA014 prgCXC1250719_GENERIC_ME
MAPP CXC version: R4HA014
Language Package:AMERICA_2
CDA article: CDA102737/16
CDA version: R1A
Default article: cxc1250728
Default version: R4HA014

Network LOCKED
Operator: MULTIPLE

USERCODE:0000

Elapsed:8 secs.
FILE RECOGNIZED AS CUSTOMIZATION PACKAGE.
CDA:CDA102576/107
MODEL:K310 GEN
VARIANT:AMERICA_2
LANGUAGE: EN
LANGUAGE: PB
LANGUAGE: XL
ChipID:8040,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:49
Speed:921600
OTP LOCKED:1 CID:49 PAF:1 IMEI:35############7 CERT:RED
PATCH:061204 1529 HAN_DB2010_MEM_PATCHER_R2A007_CXC9876543210 0
LDR:060718 0842 LIE_DB2010_FLASHLOADER_R2A003_CXC1326738
Flash ID check:2019
Flash props sent ok

DETACH CABLE FROM PHONE.
REMOVE BATTERY FROM PHONE, THEN INSERT IT BACK
THEN PRESS "READY"

ChipID:8040,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:49
Speed:921600
Trying to launch embedded bootloader...
Embedded flashloader:
COMPACT_ID_LOADER_CRIPPLED_SETOOL2_R2
Flash ID check:2019
Flash props sent ok
FOUND: R4DA044_CXC1250466_GENERIC_DO
Restore from:R4DA044_CXC1250466_GENERIC_DO
writing C:\Documents and Settings\admin\Mis documentos\SONY ERICSSON K 310\PROGRAMAS FLASH\k310\K310_R4DA044_MAIN_GENERIC_DO_RED49.mbn
CURRENT FLASH FILE CID:49
SSW uses dynamic hash, dynamic hash len is:304
Will flash 304 blocks...
SSW loading returns:0
writing C:\Documents and Settings\admin\Mis documentos\SONY ERICSSON K 310\PROGRAMAS FLASH\k310\K310_R4DA044_FS_AMERICA_2_RED49.fbn
CURRENT FLASH FILE CID:49
SSW uses dynamic hash, dynamic hash len is:109
Will flash 109 blocks...
SSW loading returns:0
CSloader version:
SETOOL2 LITE COMPACT_SEMC_FS_LOADER (FAT V26)
loader startup: executed
Can't get packet properties.
wrong response, break.
loader fs startup failed, that is fatal
Elapsed:646 secs.
ya se me agotaron todas las posibilidades al parecer pero voy a intentar con phone xs ya que con setool no puedo, que me recomiendan