WMA to M4R Converter
How to convert wma music files to m4r ringtone?
WMA to M4R Converter is an outstanding iphone ringtone m4r converter which can help you convert any format files in your entire and growing music library to M4R ringtone with high out-put quality and fast converting speed.
Apart from that, it allows you to clip any WMA segment to M4R, rename or remove ringtone from iPhone directly. So you can assign a unique ringtone for every contact and with WMA to M4R Converter.
Guide to convert wma files to m4r for iphone ringtone
Firstly, Free download WMA to M4R Converter, launch and run it in your computer
See the following picture:

Secondly, Import one audio file you want to set as iphone ringtone by clicking "Add File " button; There are two sliders which mean start point and end point. Drag them to cut any clip you like from the audio file. "Play" button is to pre-listen to the added music.

Thirdly, Set Local Output Folder where the output file will be stored by clicking "Browse" button.Then click "Generate" button to start the conversion from wma audio to iphone ringtone.

Forthly, See "Manage Ringtone " button which is to manage all ringtones on your iphone. For example, you can remove unwanted ringtones from your iphone or rename the ringtones.
Just tick before the "Export to iPhone" to transfer the converted m4r files to iPhone without itunes!