Why is there no SMS prompt tone for iphone 6s plus?

The steps of turning on SMS prompt tone for iPhone 6SPUL are as follows: Prerequisites: Turn off mute and turn on settings.

2. Click the notification.

3. Open the mail.

4. Just turn on the notification switch.

Phone 6 uses a 4.7-inch screen with a resolution of 1334×750 pixels, and has a 64-bit architecture with Apple A8 processor, which significantly improves its performance. At the same time, it is equipped with a brand-new M8 coprocessor, which is specially designed for health applications. Adopt a rear 8 megapixel lens and a front 65438+200,000 pixel FaceTime HD HD camera; And add touch ID to support fingerprint identification, and add NFC function for the first time; It's also a three netcom mobile phone, 4G? The LTE connection speed can reach 150Mbps, and it supports up to 20 LTE frequency bands.