I have ordered a new HTC desire 816 International version, i will try to unlock the bootloader to see if any of these apps (calc, vibrator, or others) will stop working, if not i will get a backup and posted over here ... just lest wait and see
Thanks Faouzi. Will look forward for your backup too. I dont know why dev's unable to prepare a RUU from the nandroid backups. Not sure if it is any possible ? But if it is, there are many 816 dual sim RUU hungry people over here in this world and they are all need some good developers time and devotion