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Phone

iMessage, SMS, or MMS to a dedicated VM0 number — no app required.

Last updated May 27, 2026 · 3 min read

Phone is the simplest channel Zero has: text a phone number, get a reply. No app, no install, no OAuth — just iMessage, SMS, or MMS to a VM0-owned number that's connected to your account.

It's the right channel when you want to ask Zero something from anywhere without opening an app: approving a draft, kicking off a quick task, replying to a question.

Connecting

  1. Open Where Zero works in VM0 and choose Phone.
  2. Enter your mobile number. VM0 sends a verification message to that number.
  3. Tap the link in the verification message to confirm the number is yours.
  4. Once verified, the Where Zero works page shows the VM0 number to text. Save it in your contacts.

After verification, every message from your phone is recognized as you. Other numbers texting the same VM0 number are ignored.

How you use Zero by phone

Send a message to the VM0 number. Zero replies in the same conversation. Each conversation maps to a session in VM0 — past messages stay visible in your web chat history.

Typical asks look like:

  • "Approve the customer reply you drafted earlier."
  • "Summarize the #cs Slack channel since this morning."
  • "When's my next meeting?"
  • "File a bug: nav link on the landing page 404s on mobile Safari."

iMessage, SMS, and MMS

The VM0 number accepts all three:

  • iMessage — the most reliable path. Use this whenever possible, especially for longer messages or photos.
  • SMS — works for short text. Delivery is best-effort; long messages may be split.
  • MMS — works for photos and short videos. Like SMS, delivery may not always be reliable.

If a reply doesn't arrive, iMessage usually does. The platform shows a warning when you connect via SMS or MMS to flag this up front.

Common phone workflows

  • Approvals on the go. Zero drafts something in web chat, you walk away from your laptop, the reply needs sign-off. Text "approve" and the action runs.
  • Quick captures. Drop a screenshot of a receipt to file an expense, or a photo of a whiteboard to convert to text.
  • Reachability while traveling. No corporate VPN, no Slack login — just a phone signal. Zero still answers.

Identity and security

The VM0 number only accepts messages from your verified phone. Anyone else texting it gets nothing back. To disconnect, revoke the phone number from Where Zero works — the number immediately stops being recognized.

Outbound messages from Zero come from the same VM0 number; recipients you forward messages to never see your personal number.

Limits

  • One verified number per user. To change it, disconnect and re-verify the new number.
  • Carrier filtering. Some carriers block automated SMS aggressively. If iMessage works but SMS doesn't, the carrier is filtering — there's no workaround beyond iMessage.
  • No voice calls. The number is text-only; calling it does nothing.

What's next

  • See Skills for capturing repeated phone-driven tasks.
  • See Permissions for what Zero can do without you at a screen.