How do I merge SMS threads? I sent an SMS to several contacts, so Android put it in one thread as "Alice, Bob, Charlie, Dylan, Ed, and 5 more". Then Bob and Ed replied, each having their own threads.

Can I merge Bob's and Ed's threads with the multi-contact thread? How do I do that?
From http://forum.xda-developers.com/showthread.php?t=1227352 :


  I successfully merged SMS threads by creating a backup using SMS Backup &amp; Restore.
  
  Just open the created .xml file in e.g. Notepad++, then replace your
  contact's old number in the "address" field with the new one. Now load
  the altered backup file back onto your phone, delete your messages
  from within the app, and restore your newly created backup file.
  Although it worked fine for me on the first try, I recommend keeping
  your initial backup file, and save your editing to a copy - just in
  case.
  
  Using this method, I also fixed some splitted threads, where one
  contact with one number got split up in several threads, because of an
  incorrect number restore from backups when switching phones.
  
  Hope this helps. :)


Here's SMS Backup &amp; Restore