How to turn off imeeage SMS

Step 1: If you move the SIM card from the iPhone to a non-Apple phone, please put it back on the iPhone.

Step 2: Make sure you are connected to the cellular data network.

Step 3: click settings > information, and then turn off iMessage information.

If you can't use iPhone, you can log out of iMessage information online. After logging out, your phone number will be deleted from the iMessage information service. You should be able to receive SMS messages immediately, but it may take several hours for some Apple devices to recognize that you didn't use iMessage messages when sending you messages. If someone sends iMessage information to your AppleID, your other Apple devices will receive iMessage information. If someone sends a short message to your mobile phone number, only your mobile phone will receive the short message/MMS.