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Connect Sony Xperia Z1 Compact to computer
Open "Xperia Z1 Compact"
Open "Internal Storage"
Open "Ringtones"
Drag your ringtone into this folder
Back to "Internal Storage"
Open "Notifications"
Drag your notification sound into this folder
Swipe down from the notifications bar, tap the "Settings" icon
Tap "Sound"
Tap "Phone ringtone"
Choose the ringtone just put in "ringtones" folder
Tap "Done"
Tap "Notification sound"
Choose the notification sound just put in "notifications" folder
Tap "Done"