Why doesn't Apple's seven plus SMS band effect have echo effect?

1. Mobile phone settings;

2. Find the notice;

3. Click on the information;

4. Open it for setting after finding the repeated reminder;

The IPhone 7 has a newly designed Home button, which adds vibration feedback. Support waterproof and dustproof function, dual cameras, anti-shake function, and added a faster processor. The throughput of the camera's processor ISP is twice that of the original.