FIXED NOW,
FOLLOW THIS CONFIGURATION ERROR - Answer is here - Top Sony Forums
BEFORE the above link.
Ok, so the phone isn't bricked (I don't think), but it's not unlocked and when I put my old SIM card in (Orange) there's an operations error. The configuration as it stands is:
ChipID:9900,EMP protocol:0301
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
Speed:921600
Flash ID check:2019
Flash props sent ok
OTP LOCKED:1 CID:51 PAF:1 IMEI:35536301438141 CERT:RED
FLASH CID:52 COLOR:RED
Model:W850i
MAPP CXC article: R1KG001 prgCXC1250200_GENERIC_CY
MAPP CXC version: R1KG001
Language Package:ORANGE_GEN
CDA article: CDA102677/36
CDA version: R11A
Default article: cxc1250489
Default version: R1JC002
Network LOCKED
Operator: 234-33
So it still has the Orange language pack, not Chinese and also it's still locked. Maybe I used an old version of SimLockPatchGen (2.1.0.0)
This is what happens when I try to do it:
Patch structure created OK. Determining blocks to read...
New block #0000 added: $44740000
Blocks selected OK. Reading blocks: 1
Block @ $44740000 read error. Have only: 00000000 bytes
Elapsed:8 secs.
I'm not quite sure what my next steps are...