Who told you apple is a failure.? Use it and tell. I am using it for past 6 years. I phone 4s and 5s. no worries till now.
I dont know where its service center locates in my town. Really happy with its performance because I have no problem in that so I go to service center.
must be done with the iTunes app available for both mac and windows. Drag and drop the downloaded songs to iTunes app. Connect the phone. The connected iPhone will be displayed as a icon in the left top of the iTunes app. Click it. You’ll find a sync option on the newly opened screen. Click. The songs images videos are copied to the phone. The best part with your iPhone is that the files you add to your phone are organised unlike in a android.