Try the green/3/*
- Turn off PIN code requests.
- Charge the phone fully.
- Turn off the phone.
- Remove the memory card (not really needed, but I usually do it to be on the safe side).
- Put the phone on a table (easier to press the keys then, in my opinion).
- Press the three keys and keep them securely down and do not release.
- While the keys are still down, turn the power on.
- Do not release the three keys until you see the prompt for the home city.
If it doesn't work, retry until you get it right. It is easier if you have three hands.