To use the Signal app, you install it on your phone, register with your phone number, set up a basic profile and PIN, then start secure chats, calls, and groups from the main pencil/message icon.

What Signal Is

Signal is a private messaging app that offers end‑to‑end encrypted texts, voice calls, video calls, and group chats, making it popular with people who care about privacy.

It is free, open source, and works on Android, iOS, and, once linked, on desktop apps like Windows, macOS, and Linux.

Install and Set Up

  • Download “Signal – Private Messenger” from Google Play or the Apple App Store.
  • Open it, enter your phone number, and confirm the six‑digit code sent via SMS to register.
  • Create a simple profile (first name, optional photo) and choose a PIN to help protect your account and restore it if you change phones.

Start Messaging and Calling

  • Tap the pencil/new message icon to see which contacts are on Signal, then tap a name to open a chat and start typing.
  • Use the paperclip/camera icons in the chat to send photos, videos, voice messages, stickers, and files, all encrypted end to end.
  • Tap the phone or video‑camera icon in a chat to make encrypted voice or video calls that work much like other calling apps.

Groups, Desktop, and Privacy Extras

  • Create a group by tapping New Message → New group, then add people, name the group, and set an icon to start secure group chats.
  • Link Signal on desktop or iPad by installing Signal there, then in your phone app go to Settings → Linked Devices and scan the QR code.
  • In Settings → Privacy you can turn on registration lock, tweak read receipts and typing indicators, and control link previews for stronger privacy.

Information gathered from public forums or data available on the internet and portrayed here.