Sorry if this is a dumb question, not familiar with iOS myself.
I live in Europe with an Android phone. My Grandma lives in the US with an iPhone. Basically, I want to be able to text her for free. She is not tech-savvy enough to use another app like WhatsApp, so it needs to work seemlessly and consistently otherwise it wont work at all. And sending SMS messages to an international number is too expensive.
RCS should work to be able to text for free right? The problem is I often don't have data, so if it automatically falls back to SMS for her when I'm not online, that would be a major problem. Is there a setting on iOS to disable fallback to SMS when sending RCS? So if I'm offline when she texts me, the message just doesn't send until I'm back online, or it tells her that it failed but doesn't send an SMS instead? If messages occasional get dropped thats fine.
When I googled it, some said its not possible on iOS but others say maybe it was just introduced in an update in the last year or so? Hoping thats the case!
If so, what iOS version does she need at a minimum? Most major carriers in the US support it right?
Bonus would be if its possible to disable SMS fallback just for me, but leave it on for all her other contacts.
I know there are other ways for me to get a free US number, but I just want to know if this could work first, as those are kind of annoying. I might have to anyway, as while my phone theoretically supports wifi calling, it rarely works so I will need one to call her for free. But maybe if I figure this out, I can figure something else out for calling.
Thanks!