Test messages being sent to landline contacts rather than their mobile phone
How do I stop texts from automatically being routed to contacts' landlines, which of course do not get delivered? I am responding on a thread of messages from contacts, some of which are messages from their mobile phones and some are automatically transcribed voice
messages from their landlines. Do I have to turn off the transcription function to ensure that the thread only contains mobile phone contacts? I'm on an iPhone 12, which amazingly is not available as a "Choose a different device" function on this support site. What the heck is happening at Apple?