What is the reason why the SMS ringtone of IOS 15. 1 is smaller than the phone ringtone?

Ios 15. 1. 1 SMS ringtone is smaller than telephone ringtone because of the function of the mobile phone, but the sound is actually the same.

Try to use the ringtone that comes with the system, or after backing up important data files in your phone, go to Phone Settings-Other Settings-and click Restore Phone, or you can take your phone to the customer service center for a free test, if you use an OPPO phone.

Notification center:

The notification center can keep you informed of new emails, missed calls, to-do items and more information. A new function called "Today" can summarize today's dynamic information for you, which is very convenient.

Take a look at your iPhone, and you will know whether today is someone's birthday, whether you need an umbrella, whether the traffic situation will affect your commute, and you can even receive a reminder about tomorrow. You can access the notification center from any screen, including the lock screen. As long as you slide down, you can quickly grasp all kinds of dynamic information.

The "Today" view gives you a comprehensive grasp of the information you need to know today and a glimpse of tomorrow. With the new "All" and "Unread Notifications" views, you can view all reminders, or only those that have not been processed in the past 24 hours.