Via Magisk Module (safest):
Create /data/adb/modules/mymod/system/etc/device_features/XXX.xml
Reboot → Magisk overlays original file.
Via adb root:
adb push XXX.xml /sdcard/
adb shell
su
mount -o rw,remount /system
cp /sdcard/XXX.xml /system/etc/device_features/XXX.xml
chmod 644 /system/etc/device_features/XXX.xml
reboot
Via custom recovery (TWRP):
Always backup original files and have a stock firmware flash ready.
The default firmware only accepts .mid ringtones under 30KB. By repacking media_profiles.xml, you can change the max file size and add .mp3 support. nokia 14 xml file repack
This is where most repacks fail. Nokia BB5 phones store a checksum of the XML file inside the firmware header. Use the Nokia Checksum Tool:
After flashing, reboot and immediately perform a factory reset (Volume Up + Power → Wipe data/factory reset). This forces the phone to re-index the new XML files. Via custom recovery (TWRP):
Using a command-line interface:
apktool d settings.apk -o settings_folder