[Giovanny]

Like everyone else says:

Step 1: turn off the cell phone radio using the command manger. In other words place the phone on airplane mode.
Step 2: go to Settings and Text message layout and on the drop down menu select classic.
(If you don't have this option on settings go to windows folder and scroll down until you find SMSInboxThre..)
Step 3: Now go to PIM and restore all you messages.
Step 4:Go back to step 2 and enable Thread messages and soft reset.
Stpe 5: Once start up again go back to text messages and let it load everything and don't interrupt the process and you're done.
Step 6: you can now turn the radio on.