The way that finally worked for me was:
- Turn on the phone
- Plug in the flash cable in the phone and pc
- Check COM port in Device manager
- Start up SN-Write tool (with phone still on and connected)
- fill in the settings (COM port was automatically correctly chosen for me, the DB files I put in a directory directly on root level of hard disk, so not 5 subdirectories below, not sure if this matters though)
- Press F6/OK
- Take out battery without turning off the phone....wait more than 10 seconds
- Fill in both IMEIs
- Click OK
- Put in battery and turn on phone and keep ON button pressed in
Now I finally saw META in the bottom left of the phone screen and in the SN_Write application screen I saw it write the IMEA succesfully.
Mind you, after that the pop-up window from the IMEI's appeared again, making it seem like it was unsuccesfull. This caused me to do it three times more! However, then I noticed that the window in the SN_Write tool gave 3 passes, so I unhooked the phone and restarted it and then it worked.