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@@ -385,7 +385,7 @@ that matters to you.
### Backing up your phone
On the Android application, **Phone → Android Sync** in the side menu backs up
-your phone's photos and contacts to a group.
+your phone's photos, contacts and text messages to a group.
**Where backups go** is chosen once, at the top of the page, for every kind:
@@ -430,6 +430,18 @@ your phone's photos and contacts to a group.
- It runs on any connection, since a copy is small. **Back up now** sends one
at once if your contacts changed since the last copy.
+#### Text messages
+
+- **Turn on** asks for access to your text messages. The first copy holds them
+ all; then, once a day, a new file holds only the ones that arrived or were
+ sent since.
+- The files go by year (`alice-messages/2026/sms-2026-10-10-0900.xml`), in the
+ XML format SMS backup applications can restore onto a phone. Senders are
+ named when contacts backup is also allowed. Multimedia messages (MMS) are
+ not included.
+- The version of the application from the Play Store has no text messages
+ backup: Play allows reading them only to the phone's messaging application.
+
If a backup cannot go on (the node's disk is full, the folder no longer accepts
files, somebody else joined the group), it stops, says why once in a
notification and on the Android Sync page, and tries again the next day.