I can't sync music into my iPhone 5c?

I recently go an iPhone 5c and after 2 weeks of having it I've decided to sync music from my sister's laptop since mine doesn't work anymore. I'm using the same account that I use for my iPod Touch 4. When I connect my iPhone it says that "the device is timed out". My sister got the same phone as me and her's is working perfectly fine when you connected to her iPhone or iPad to her computer. I did have an issue with my iPod touch for a couple weeks saying that it wouldn't back up to iCloud so I had to erase many pictured and it wasn't until I backed it up with my sister's laptop that it stop telling me to back it up. I don't know if that helps at all but please help me I really want to put in music on my iPhone.

I need to know if you are using iTunes to sync music? Because iTunes always has some problem with me. And I tried to find out other software to replace iTunes, but I found out that though the software can transfer you music, they all need iTunes to be installed on your computer. I'm still finding the best one and I think I will find the one.

Did yiu find out how to fix it? Same problem here