Send all messages as SMS
Go to Settings > Messages
Toggle iMessages switch to off

Go to Settings > Messages
Toggle Send as SMS switch to on

Send messages as texts on a manual basis
Go to Settings > Messages
Toggle Send as SMS switch to off
When iMessage is unavailable, individual messages will not send. Tap and hold these individual messages until you get an options menu.
Tap "Send as Text Message" and watch your bubble turn from blue to green. That’s how you know your message has been sent as an SMS text rather than an iMessage.

Go to Settings > Messages
Toggle iMessages switch to off

Go to Settings > Messages
Toggle Send as SMS switch to on

Send messages as texts on a manual basis
Go to Settings > Messages
Toggle Send as SMS switch to off
When iMessage is unavailable, individual messages will not send. Tap and hold these individual messages until you get an options menu.
Tap "Send as Text Message" and watch your bubble turn from blue to green. That’s how you know your message has been sent as an SMS text rather than an iMessage.

Updated on: 03 / 04 / 2022