How to set Apple's 6s Plus boot as SMS reminder?

No, there is no SMS password setting option in Apple 6plus settings. In fact, as long as the text message is sent out, the mobile phone itself will have a prompt, but in order to further confirm that the text message is indeed sent out, follow the steps.

1: Click Settings-Privacy-and then open Location Services.

2: Return to the settings page, open the notification, and then change the prompt to allow notification.

3. Return to the settings page again, open the information, then open iMessage, finally open the send read receipt-display the subject bar-send and receive information-count the number of characters-and finally change the reserved information to permanent.