For Nokia Phone User! specially to Symbian OS.
this problem may happen to you!
Important reminder:
If you have anything stored on the phone memory that you woudn't want to delete, such as Contacts, Messages, Pictures, Videos or whatever, back it up to your memory card or computer using PC SUITE. The format process deletes all stored memory on the phone, but not the memory card.
To format
1. turn phone off.
2. hold the following keys WHILE its turning back on: (3 + * + green call key)
3. do not let go until it asks you about your location or whatever
this problem may happen to you!
Important reminder:
If you have anything stored on the phone memory that you woudn't want to delete, such as Contacts, Messages, Pictures, Videos or whatever, back it up to your memory card or computer using PC SUITE. The format process deletes all stored memory on the phone, but not the memory card.
To format
1. turn phone off.
2. hold the following keys WHILE its turning back on: (3 + * + green call key)
3. do not let go until it asks you about your location or whatever