4 - Use a pager.

3 - Never could use one.

1 - Use the speakerphone.

Taishin! Taishin!

Sorry...

2 - Use earphones.

Hello? Mum?

Hello!? Trainer-san!?

Trainer-san! Can you hear me!?

MYSTERIES OF THE UMAMUSUME WORLD: TELEPHONES AND SMARTPHONES

...keep it down!

You're hurting my ears!

There are phones made specifically for the ears on top of the umamusume's heads.

But when you look at the anime and games, there are no smartphones made specifically for them.

Just how do the Umamusume make calls on a smartphone!?

A hypothesis!

89! Bacchigu! 8 > hachi > bachi / 9 > ku > gu ≫ bachigu bacchiri + guudo (good) = 'very good'