What is the reason why the Nokia e66 mobile phone receives a text message but cannot see the message?

SMS cannot be opened and there is no message. Solution:

1: Shut down the phone and remove the memory card! Just turn on the computer and open the message function and then insert the card. Method

2: Copy the mail file to the c\system\ folder and back it up! Then I went to c\mail and deleted all the files in it, and encountered the skip in use. In the end, there is only one file left, which is the text message file and cannot be deleted! Open the text message and press the text message option. At this time, the phone will not respond in any way. Go back to c\mail and there is an extra file 00001000. Change it to 00100001 and press the SMS function to come back! Then overwrite the copied backup mail file and it's ok! If it still doesn't work, I have to use a grid machine! Hard grid: Make sure the battery is sufficient. If the phone runs out of battery during operation, it may result in the phone being reimbursed! Please remove the memory card before formatting. Press the power button and press the dial key + 3 key + * key at the same time (four keys at the same time) until FORMATTING appears on the screen!