When you send an SMS message to a turned off iPhone then check say an hour later and the SEND button is blue, does that mean the user at some point has switched on to check messages? Cause I tried to resend as iMessage and it went green again?
IPhone – How does Messages determine whether the SEND button should be green or blue
iphonemessages
Related Solutions
If the messages are grey then they are being received. The colour doesn't change on the type they use. However if you use iMessage then the message back will be iMessage unless it stats above it that it is a message, as both users need to have iMessage enabled at the same time to use the feature, otherwise an SMS message is sent.
If you scroll up in the message history you will see what the last type of message used was. There will be a line break with iMessage or Message written in it. All messages after that point are dove via this method, until a new break is made.
On your iPhone, I'd try going into Settings > Messages > Text Message Forwarding and then uncheck the switches by whatever is not receiving SMS messages and then check and then re-authenticate them individually, it should only take a couple of minutes.
Best Answer
If the recipient's iMessage is unavailable, or yours, for that matter, the Send button will be turned to Green, showing that you'll send a SMS. When the iMessage service is available again, the button will be turned Blue, showing that you'll be sending iMessages instead of SMS.
So, if you want to make sure you'll always be sending an iMessage, although the service is unavailable, meaning that the recipient will receive the text whenever it's possible, just switch off the Send as SMS under Settings / Messages.