Q: Accidently decommissioned my 4s now cant listen to my music. Trying to register it again but cant?

Hi stevefrompenticton,

Welcome to the Apple Support Communities! I'm sorry to hear you are having these issues with your iPhone. I'm a bit unclear on exactly what you are seeing or describing (any specific error or alert message?), but if you are having issues activating your iPhone, you may find the information and troubleshooting steps outlined in the following article helpful:

If you can't activate your iPhone - Apple Support

Regards