It is possible that the SIM reader has a failure althought that doesn't have to be the main reason. For example, when I unlock 6250 on some SW after unlock I get in Nokia tool 034 that phone is still locked but when I put the SIM card inside, the phone accepts it
I don't understand why it's so
Anyway, soon I will put for download a 100% working f_loader.bin file for the use with 8210 5.27...
Spalato
http://www.cro-web.com/maroon