my phone failed to switch on and to show menu. How softly I can reset/factory setting without deleting data/memory within the phone. It was caused by interrupted decryption/encryption. When you switch on, start by showing the word " NOKIA" but it does not proceed to switch on. And you can not switch off on that situation until you remove the battery. I was encrypting/decrypting phone and memory card, but I inteerupted accidentally. After interrupting the process, I was trying to open menu but the message came that "no service" I think that. I decided to remove the battery in order to restart the phone, but unfortunately, the phone ended without switching on. Firstly, I encrypted memory card, and unfortunately did not see any data from memory. Then I was trying to decrypt in order to see the data, but I interrupted the process hence caused the problem