Apple SMS has an exclamation point. How to turn it off?

IPhone can't send SMS for fault diagnosis:

1. Confirm that the signal is normal and close the flight mode.

2. Check whether the SIM card status is normal.

3. Check whether the send key is bright and clickable.

4. If you can't click Send after entering the text, the "Send" key is still gray. Please turn off "Show Subject Bar" in Settings > SMS >.

5. If you send text messages to multiple people and manually enter numbers, please make sure to use line breaks instead of spaces to separate each number.

6. If you can receive or not send short messages, you can edit the number of the short message center through internal commands after eliminating the above problems.

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IPhone OS is an operating system developed by Apple for iPhone. Mainly used for IPhone and IPod Touch. Just like its Mac OS X operating system, it is also based on Darwin. The system architecture of IPhone OS is divided into four layers: core OS layer, core service layer, media layer and Cocoa Touch layer. System operation occupies about 5 12MB of storage space. IOS is particularly scalable. With the IPhone, you can log in to the App Store with one click and easily download the applications you need. There is no need to worry about viruses when using IPhone. You can find everything from software to games. Imitation of knockoffs on the interface, the real skill-expansibility can never be imitated. The powerful security of IOS is unmatched by other smart operating systems of mobile phones.