Well that's a funny thing, because what is a text message? Does it include RCS? Does it include WhatsApp? What about Telegram?
I made a text file and emailed it to my boss a few weeks back, is that a "text" ?
I made a text file and emailed it to my boss a few weeks back, is that a "text" ?
A text message is something in Messages.app or the Google equivalent. It may include a message in Signal or WhatsApp, but I suspect they'd want to see some case precedence supporting that. It almost certainly isn't a screenshot in their photos app, or a message written in text in the notes app, or Aretha Franklin spelling out R-E-S-P-E-C-T in the music app.
It's a message in the phone's commonly used messaging app. Anything much beyond that is likely to earn a scolding from an unimpressed judge.
My answer would be: yes "text messages" includes RCS as well as SMS, but not whatsapp/telegram/an email attachment, and that the warrant should've been more specific if it wanted the latter - but ask your lawyer if you're uncertain what's being requested.