I had locked 3510 V 4.24. Since i have only cheap Chinese box i couldn't unlock it via direct unlock. So i search the forum and saw that Alinus told to somebody to downgrade it to 3.37 and than unlock it. I tried it and after that phone is dead. After flashing on 4.24 again (i had to download 22 MB) the phone is in great condition (contact service). What to do now...help pleaseeeeeee