Status & limits

phantom is early. This page says plainly what works and what doesn't, so you can decide.

Works

Registration (token-gated), login, logout, devices.
Rooms: create, join, leave, invite, send, edit, react, redact, state, aliases, the directory.
Sync, typing, receipts, presence, account data, push rules.
Media upload and download.
End-to-end encryption: device and cross-signing keys, one-time and fallback keys, key backups.
Room versions 1 through 12; new rooms default to 11.
Federation between phantom servers, in room versions 11 and 12, including joins, messages and room upgrades.
HTTPS served directly when [global.tls] is set.
The admin room, the first account becoming admin, and !admin commands.
Adding and verifying phone numbers by text message, through an SMS gateway.
Blocking servers, quarantining media and cancelling admin tasks while the server runs.
The admin API and every console section.

Gap	What it means
Federation only tried phantom to phantom	it hasn't yet been run against Synapse or another implementation
No registration by phone	phone numbers can be added and used for password resets, not to sign up
No E2EE in the console	encrypted rooms can't be read there; other clients are fine

Don't deploy phantom where it matters yet.