If you're looking for information or the contents of this specific file, here are a few suggestions:
4.2. Sensitive Data Exposure Within the extracted squashfs, we discovered: t21p-e2.bin
You would typically encounter this file when manually updating the phone via its web interface or a provisioning server. If you're looking for information or the contents
Reconnect the power while continuing to hold the Speakerphone button until the "Recovery Mode" wizard appears on the LCD screen. 3. Configure Network Settings How to get a recovery file? - Yealink Support t21p-e2.bin