Yes , as i mention that there are some iphones can't use this method.
the most important part is those iphones can't use iphuc for "setafc com.apple.afc2"
for a test, double click iphuc.exe
and type "setafc com.apple.afc2"
1 second later, it will finish the command.
if iphone displays error, then try one more.
if same problem or error occurs, then it means your iphone can't use this iphuc.
if everything all right, type "ls".
then you would see the root file system. e.g.
/Applications
/usr
/bin
/private
/root
if you can display the above, that means you can use my method to upload ringtones.
for screenshot, please visit
http://iphone.org.hk/cgi-bin/ch/topi...=1&bpg=2&age=0