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The COMM button is in the lower right corner in Scanner.
COMM is a feature in the Scanner and Intel Map for browsing notifications and chatting between Agents. There are tabs (filters) under COMM: "All", "Faction" and "Alerts".
To disable or enable push notifications for in-Scanner events, use the "Device" tab in the OPS screen. See Device#Notifications.
In-Scanner Chat[]
Notification for an @mention.
In-Scanner chat is available from two COMM tabs; messages under the "All" tab are public: Agents of both Factions can see them.
Messages sent from the "Faction" tab can only be seen by the same faction. These messages are prepended with [secure] in the "All" tab. However, experienced agents typically do not trust the Faction COMM for any operations chat, since it is easily possible for enemies to see the messages using Double Accounts. Most communities have adopted other means of communication, such as Telegram or Google Hangouts.
Other Agents can be "pinged" by typing @username. This means they will see the message even if the sender is outside their chosen COMM Range. Additionally, they will receive a push notification (if they did not disable it in settings). This can be used to check any Agent's stats, as long-pressing on the @'-mention can be used to open their profile. In the "Faction" tab, this only works for friendly Agents.
COMM-Messages are limited to 256 characters and 10 mentioned Agents.
Notifications[]
Notifications about nearby Agents' actions appear in the "Activities" tab and personalized notifications in the "Alerts" tab. Sometimes remaining stealthy by avoiding notifications can be a tactical advantage, such as for taking down a well-guarded Portal. Notably, Portal Mods can be destroyed without triggering any notifications (e.g. using low-enough Ultra Strikes 
that do not reach the Resonators 
).
Note that different sets of notifications appear in the Scanner and the Intel Map version of the Activities tab:
| Event | Activities (Scanner) |
Activities (Intel Map) |
Alerts |
|---|---|---|---|
| Portal Mod destroyed | No | No | No |
| Resonator damaged
|
No | No | Yes |
| Resonator destroyed
|
No | Yes | No |
| Portal neutralized | Yes | Yes | Yes |
| Portal captured (1st Resonator )
|
Yes | Yes | No |
| Resonator deployed
|
No | Yes | No |
| Resonator upgraded
|
No | No | No |
| Link/Control Field Δ created | Yes | Yes | No |
| Portal Mod deployed | No | No | No |
| Fracker deployed | Yes | Yes | No |
| Beacon deployed | Yes | Yes | No |
| Firework deployed | Yes | Yes | No |
Battle Beacon  deployed
|
Yes | Yes | Yes (if Agent owns Portal, its Resonators or Mods)
|
| Battle Beacon Conclusion
|
Yes | Yes | Yes (if Agent participated) |
| Drone returned | Yes | Yes | Yes (if own was returned) |
| Scout Controller gained | No | No | Yes |
| Scout Controller lost | No | No | Yes |
| Mentioned in Chat | No | No | Yes |