[AC Question]

the only place I see sms default is within the app I have downloaded, 'messenge'.
in the device (tool) settings, I don't see any place that allows for defining what app
should sms be assigned, there is no sms default, or sms anything.
in the message app, if you go into settings a line says default sms app but nothing happens when I tap it or try to slide it.
I am so lost.
can someone help me please?

[jeffhaskins]

In some devices it is Settings/More, on others it has it's own header usually called app defaults, I've also seen on some Samsung devices it will be Settings/App Manager/then hit the menu button in the top right corner. I hope you find it. What OS and phone model?

[ManiacJoe]

When you say "SMS" are you referring to an app named "SMS something" or are you referring to the transportation protocol?

You don't set SMS as a default for an app. You set an app as the default message app to send SMS messages.