Im kinda new here in this forum so greet me well . ^^
Well I juz finished searching and figured out . I would like to share how to combine multiple mmssms.db (Message Data) file into one file where the file located on /data/data/.com.android.providers/databases
So what we gonna need is these 2 file .
*[TOOL] yaffs extractor, mmssms.db & contacts2.db converter
*SMS Backup & Restore
1. Extract yaffs extractor, mmssms.db & contacts2.db converter to you main drive. (Like mine ish C:\ )
So theres the file that you extracted located open it up and see wether all the file extracted is same as in the pic.
2. Next we have to put the *.db file in the yaffs extractor, mmssms.db & contacts2.db converter folder,I have 2 backup *.db so I made 2 folder(Message1 and Message2) which is each mmssms.db file in each folder.
3. So now were gonna convert the *.db file into *.xml .
Run cmd and put this command . (Convert all your backup *.db cause we gonna need it , depends how many you have )
extract -s Message1\mmssms.db
Juz put anyname you like as long you put .xml along with the name .
And the converted file will be in the same folder yaffs extractor, mmssms.db & contacts2.db converter in the *.xml format . We gonna need those files soon just let it there .Now we're almost done , going to next step.
Next, install SMS Backup & Restore on your phone . Put all converted *.xml file in the /sdcard/SMSBackupRestore/
Now open up SMS Backup&Restore that you have install on your sdcard.
Wait till the Apps pop out and Click on Restore , you will see the *.xml file that you have copied to the /sdcard/SMSBackupRestore/ .
Now, Click on each of *.xml and restore every single of your backup message file.
And the Results ..
The Failed might be due to corrupted or unread message while backup.
Thats it ! You're done, you have merged all of you mmssms.db into one file.
Goodluck on trying , glad to help and share. ^^