iTunes automatically syncs your iPhone with your current iTunes library each time you connect the device to your PC. Depending on the size of your music collection, however, the process can be inconvenient and take several minutes to complete. To add songs to the iPhone without synching your entire library, access the program’s settings and disable the automatic sync option. After switching the sync setting, you can manually transfer songs to the device each time you connect it to your computer. Writer Bio

How to Add a Song to an iPhone Without Syncing - 73