After upgrading my N8 to Bella, there are 3 unread messages in my inbox, but there is nothing after opening it.

I have been in this situation. There are several situations to look at, 1. Maybe this information is not in your mobile phone, but in your card, which makes it impossible to view it. 2. There is a system error, so you can try to restore the factory settings. 3. Or your mailbox is full and can't be saved, so you deleted some previous emails. 4. These messages are network messages, you should be in your. The above is my personal summary, please try it.