iphone 5c stuck on apple logo

I just purchased an iPhone 5c yesterday on contract with a mobile network. They had it set up in the store for me and transferred all of my photos, videos and music from my iphone 4. I only had time to install a few apps yesterday evening and had not yet updated it to the latest ios software before putting the phone on charge last night. When I removed it from the charger this morning I found that it was frozen on the apple logo and would not turn off or on. I have tried holding in the lock button and home button for 15seconds but the apple logo just reappears and will not go away. Should I try to plug it into my laptop and restore it or is there a risk that this is a mechanical fault with the phone itself since it was only purchased yesterday?