VOIP ONE mobile app

VOIP ONE mobile app — calls, messages and voicemail on your phone

This guide: VOIP ONE mobile app for iPhone and Android. It covers sign-in, calls, transfers, park, Call Flip, messages and caller ID.

Need an account or QR code? Ask your VOIP ONE admin, or call 01223 792 100.

Product note: The app is VOIP ONE (PortSIP ONE under the hood). After this line, we only say VOIP ONE.

Also see: Desktop app guide →

On this page

  1. What the app does
  2. Download and sign in
  3. Home and tabs
  4. Calls and transfers
  5. Messages and contacts
  6. Caller ID and help

1. What the app does

One app for work calls, team chat, voicemail and contacts. Use it with a Yealink desk phone, or as your main phone away from the desk.

  • Place and receive work calls
  • Message colleagues (SMS or WhatsApp if enabled)
  • Listen to voicemail without dialling in

2. Download and sign in

  1. In the App Store or Google Play, search for VOIP ONE (listed as PortSIP ONE if that’s what you see), then install.
  2. Use the QR icon to scan the code from your welcome email or admin.
  3. For Microsoft 365, enter SIP domain/server, tap Next, then Sign in with Microsoft 365.
  4. For manual sign-in, enter SIP domain/server, username (not extension) and password, then Sign In.

3. Home and tabs

Messages is usually home. Bottom tabs typically include Messages (chat, enabled SMS/WhatsApp, voicemail), Calls (history), Contacts (company and personal), Keypad and Meetings. Open your profile for presence, account details and Settings.

4. Calls and transfers

Call from a contact, chat or Keypad. During calls you can Hold, Blind Transfer, Attended Transfer, Transfer to Voicemail, Park or Group Park. If a parked call alert flashes (Call Hub), open it and tap Retrieve. Use Call Flip to answer on another signed-in device. Open Calls to filter Missed; voicemail is under Messages → Voicemail.

5. Messages and contacts

  • Open a conversation to type and send; use + for a new chat or group.
  • Channels show only when enabled: internal Messages, SMS, WhatsApp and Voicemail.
  • Contacts may include Users, Company, Personal, Device and Favourites.
  • Add a personal contact with + Contact → fields → Save; tap the star to favourite.

6. Caller ID and help

Before dialing, use the arrow beside Call as to choose a permitted Caller ID. Block Caller ID is available when enabled.

Ask your VOIP ONE admin for accounts, QR codes and enabled features. Phone: 01223 792 100.

Next: Desktop app guide →

Download the apps Desktop guide