First post here so go easy on me!
I bought a GT540 from Carphone Warehouse (uk) and it's for O2 PAYG.
The firmware was V10A so I got KDZ_FW_UPD (the foreign one that needs Windows Enabler) and flashed it with the "Carphone Warehouse (CPW) UK Open 2.1" V20B firmware. The process failed after getting most of the way through so I pulled the battery & replaced it and it started up again in download mode & the update finished.
When I started the phone everything kept crashing until I did a factory reset then all was great EXCEPT it said my SD card was blank or unsupported & formatting it (in phone & PC) didn't do anything. Plus there was no LG logo or animations when the phone was starting up - just black screen then the Android UI. I eventually took the phone back & they gave me a new one
I still want 2.1 but I'm being a girl about trying again in case it screws up the same way & CPW won't replace again.
I've now got the English version of KDZ_FW_UPD (that has DIAG mode). What is the best 2.1 firmware to use on a UK PAYG phone from CPW? I hear that the Baltic is best but will that work in the UK? Also, I saw somewhere that you should do a factory reset & remove SIM & remove SD card BEFORE updating - is that correct?