Digimon Reboot has changed things up. One such away is what the digivices can do. In the more recent episodes we see the devices use for communication as. This was true in the old series to some extent but not this freely. Especially when the kids are just starting out. You can see the other functions below.
“The changes begin small such as with its new design. Gone are the antenna and face buttons and instead replaced with a smooth outside reflecting a piece of touch screen technology that would exist in 2020. These Digivices also work as communicators now as Tai and Matt are able to communicate with Izzy (who can appear as a tiny hologram through the Digivice now), and that’s something they were never able to before.
But the changes don’t stop there as one major shift is already front and center. In the original series, Tai and the other DigiDestined were split up into their respective journeys and in these struggles eventually unlocked the power of the Crests. Tied to their personalities, these Crests were awakened and unlocked the Ultimate form for their partners. In the reboot anime, however, these Crests are now front and center and built right into the Digivice.”

Article:https://comicbook.com/anime/2020/04/14/digimon-adventure-reboot-digivice-upgrades-anime/
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