Help SMS Not Working For ALL Contacts

[Kithikor]

I get incoming text tones from the majority of my contacts, but only a select few I don't. I eve deleted the contact of theirs, any Email, any SMS', re-added, and even changed the tone to something different, but nothing works.

Any ideas?

Thanks in advance.

 

[Rukbat]

They wouldn't all happen to be using iPhones, would they?

 

[Kithikor]

WOW! I never made the connection, but yes.
How do I fix that? Besides have them switch, they won't.