How does iphone6splus set local music as ringtone?

Iphone 6s plus can set local music as ringtones, as shown below:

1. Download and install itools first, and open itools.

2. Then, click "Music" at the top of itools, as shown below:

3. Click on the right side of "Cool Ringtone" to display popular ringtones. Select your favorite ringtone and click the "Download" button, as shown:

4. Then, click "Download Center" to view the download.

5. Select the downloaded ringtone, click Import and link the mobile phone. The downloaded ringtone can be imported into the mobile phone, as shown in the following figure:

6. Now let's set the SMS sound. In the mobile phone, we find "Settings-Voice-SMS Settings" so that we can set the SMS ringtone.