Introduction
FW 1.1.1 doesn’t recogzine .m4a files as ringtones anymore. The .m4r ringtone files are protected, so simple renaming .m4a to .m4r simply doesn’t work. The following workaround will allow you to install and use your own .m4a ringtones. After patching the MeCCA, all the .m4r files which have a space before the suffix of the filename (right before the .m4r part) will be treated as regular .m4a files.
Details
1. Patch /System/Library/Frameworks/MeCCA.framework/MeCCA:
File Offset Orginal Patched 00014458: 05 06 0001445C: 6C 03 0001445D: 10 30 0001445E: 9F 43 0001445F: E5 E0 00014462: 8F 50 00014463: E0 E5 00014464: 6D 20 00014465: 28 00 00014466: 03 51 00014467: EB E3 00014468: 00 02 0001446A: 50 00 0001446B: E3 0A 0001446C: 01 03 0001446D: 30 10 0001446E: A0 90 0001446F: 03 E5 00014470: 00 72 00014472: 00 51 00014473: 0A E3 00014474: 00 01 00014477: E3 03
2. Reboot your iphone. You only need to do it once after patching the MeCCA.
3. Put your .m4a ringtone into /Library/Ringtones.
4. The tricky part. Rename your ringtone so it ends with ‘ .m4r’, notice the space before the dot. This tells (patched) MeCCA that no special .m4r treatment is needed for this file. E.g., for a ringtone named ‘MyTone.m4a’, rename it to ‘MyTone .m4r’.
5. Go to setting/sounds, select your rigntone and enjoy.
The patched MeCCA: 1.1.1 MeCCA Patched
Credits to bgm111
