You can login to Hivetalk from your phone using any of the browser extensions you use to login to other #nostr clients.

Some recommendations:

For iOS: Nostash

For Android: Amber

And also, if you use nostr:npub1h0uj825jgcr9lzxyp37ehasuenq070707pj63je07n8mkcsg3u0qnsrwx8 , you can login to Hivetalk there too :)