Files in picture and group messages (MMS) show as a card with the file's name, type and size, marked Isolated: nothing opens by itself.
What you can do depends on the kind of file:
- Photos: Tap to preview shows them inside 1krBlocker.
- PDFs, Office documents and unknown types: Open with… hands the file to another app after a warning, Open this file in another app? Open it only if you expected it from this sender.
- App installers and similar: "This file type can harm your phone. It will not be opened."
- Any file: Export… saves a copy outside 1krBlocker (with a stronger warning for dangerous types), and Delete removes it.
Opening a file is recorded in the security history. Attachments are never uploaded for checking.
To send a photo yourself, tap Attach photo in the message box.