Every time I turn on USB as mass storage device, my phone forgets its ringtone.

This is somewhat reasonable, because the OS doesn't have access to these file while the flash belongs to another computer. But I expect that the settings to revert or be kept after it's disconnected.

Is there a way to keep it remember ringtone settings?

Current settings (but it happened on other models as well):

  • ZTE
  • CM12
  • Since it's on CM12 (rooted, naturally), could you just move your desired ringtone to /system/media/audio/ringtones? – Andy Yan Apr 13 '17 at 0:47
  • thanks. it's important to remember to set permissions at least 444 (my copy command didn't set the last 4, and the phone was not able to play these files) please write it as an answer so I can accept it – Berry Tsakala Apr 14 '17 at 14:49

Just move your desired ringtone to /system/media/audio/ringtones and set proper permissions (refer to other files in the folder).

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