How to set SMS sending for iphone 6s plus?

In fact, it is not difficult to set up the sent SMS, just "open" the iMessage button in the setting place.

Open the settings on the home screen first, and then open the following programs in turn.

Open the mail.

Open iMessage.

Open send read receipt.

Open it and send it as a short message.

Turn on sending and receiving MMS.

Open the display subject bar.

Turn on character counting.

Return to the settings page, please turn on privacy.

Then open the location service.

Turn off Apple 6plus. After 3 minutes, please turn on the phone and restart it.

After the restart, turn on the airplane mode and then turn it off.

2. If the above methods cannot be restored, please ask the landlord to restore the original settings of the mobile phone.

(1): Please ask the landlord to shut down all networks, including: (Wi-Fi, traffic) and other networks.

(2): Click [Settings].

(3): Click [General].

(4): Click [Restore].

(5): Click [Restore all settings].

(6): After the mobile phone is automatically turned off and restarted, please ask the landlord to disinfect the mobile phone [three times in a row]. I'm glad to answer your question. I wish the landlord a happy life and every day.