I have a 6s Plus (SIM free from Apple and using on AT&T). My wife has a Galaxy S6 edge Plus (AT&T variant). If I send her a text that's over 160 characters, she NEVER gets it. Is there a setting or something on my end where I can make sure she gets longer texts? It's kind of a pain that I have to split up my own messages to her. She can send me novels and they come through just fine. But as soon as mine hits 161 characters, she never gets it and it ends up in no-man's land.