There may be an occasion where you want to restore the original chronological view for the SMS Inbox rather than the new threaded view.
There is a simple registry fix to turn off threading and restore the "classic" view.
From the registry editor of your choice (PocketPC version of Total Commander for example) browse the device registry for the key:
[HKEY_CURRENT_USER\Software\Microsoft\Inbox\Settings]
Under this add a new DWORD value called "SMSInboxThreadingDisabled" and set it to 1.
Soft-reset the device and the regular message view will be used.
Set this registry value back to 0 or delete it to restore the default threaded view.
NOTE that some devices check for value at another key location:
[HKEY_CURRENT_USER\Software\Microsoft\Inbox\Settings\OEM]
109bc48a-6473-416d-838c-02182c4789d6|2|5.0