I have sound ringtones but can't apply as ringtones on my razr
The ring-tones that are saved to your memory card, if mp3 file, will only play within your music player. You cannot assign any ringtones on your memory card. You must either download a ringtone of your choice from Sprint.com (which costs per ringtone), use your "voice memo" to record your desired music and assign it as your ringtone, or download any ringtone of your choice from certain webhosts that other the service for free such as: myxer.com, mobiles24.com, phonezoo.com, zedge.com.
Hope this helps! Thanks.