At least on mobile there is no way to copy and paste things from the main screen into the phone screen. Each time I navigate from the phone screen and return the state is lost which makes it impossible to copy/paste multiple long hard to remember strings.
spoiler:
trying to copy the required info to get data working is where I am running into this issue.
When trying to enter the SPTX address dictated over the phone, I'm only able to get a few digits at a time, but returning to the phone app to press 2 to repeat the address clears all progress in the other app where I'm trying to enter it.
I battled through it and even double checked the address but it still failed.
If that's part of the game, then fair enough, but I'm not doing that again so that's the end of the line for me.
spoiler:
trying to copy the required info to get data working is where I am running into this issue.