- Basics
- The Knox Ecosystem
- White Paper
- Samsung Knox Portal
- Knox Cloud Services
- General Knox Support
- Knox Licenses
- For IT admins
- Knox Admin Portal
- Knox Suite
- Knox Platform for Enterprise
- Introduction
- How-to videos
- Before you begin
- Get started with UEMs
- Introduction
- Blackberry UEM
- Citrix Endpoint Management
- FAMOC
- IBM MaaS360
- Microsoft Intune
- MobileIron Cloud
- MobileIron Core
- Samsung Knox Manage
- SOTI MobiControl
- VMware Workspace ONE UEM
- Knox Service Plugin
- Release notes
- Migrate to Android 11
- FAQs
- Troubleshoot
- KBAs
- Knox Mobile Enrollment
- Knox Configure
- Mobile
- Wearables
- Shared Device
- FAQ
- KBAs
- Knox Capture
- Introduction
- How it works
- How-to videos
- IT admins: Get started
- Getting started with Knox Capture
- Step 1: Launch Knox Capture
- Step 2: Create a scanning profile
- Step 3: Select apps and activities
- Step 4: Configure the scanner
- Step 5: Set keystroke output rules
- Step 6: Test apps in your configuration
- Step 7: Share your configuration
- Step 8: Deploy Knox Capture in Managed mode
- End users: Get started
- Features
- Release notes
- FAQ
- KBAs
- Troubleshoot
- Knox Asset Intelligence
- Knox Manage
- Introduction
- How-to videos
- Get started
- Video: Getting started with Knox Manage
- Integration with Managed Service Provider
- Access Knox Manage
- Configure basic environments
- Create user accounts
- Create groups
- Create organization
- Set up devices and profiles
- Set up Knox Manage deployment with a Knox Suite license
- Manage Chromebooks
- Manage Android devices with the Android Management API
- Manage Shared iPads
- Configure
- Licenses
- Organization
- Users
- Sync user information
- Groups
- Devices
- Content
- Applications
- Profile
- Knox E-FOTA
- Certificates
- Advanced settings
- Monitor
- Kiosk devices
- Knox Remote Support
- Active Directory
- Microsoft Exchange
- Mobile Admin
- Appendix
- Release notes
- Features
- FAQ
- KBAs
- Knox E-FOTA
- Introduction
- How-to videos
- Get started
- Features
- EMM integration
- Appendix
- Release notes
- FAQ
- KBAs
- Troubleshoot
- Knox E-FOTA On-Premises
- Legacy Knox E-FOTA products
- Knox Guard
- Introduction
- How-to video
- Get started
- Using Knox Guard
- Dashboard
- Manage devices
- Device management
- Accept or reject devices
- Upload devices
- Delete devices
- Complete device management
- Send notifications
- Enable or disable SIM control
- Download devices as CSV
- View device log
- View device deletion log
- Start and stop blinking reminder
- Lock and unlock devices
- Update lock message
- Send relock timestamp
- Turn on/off relock reminder
- Manage policies
- Manage licenses
- Manage resellers
- Manage admins and roles
- Activity log
- Knox Deployment App
- Release notes
- FAQ
- KBAs
- Support
- Samsung Care+ for Business
- For Knox Partners
- Knox Deployment Program
- Knox MSP Program
What is a Knox Warranty Bit and how is it triggered?
The Samsung Knox warranty bit is a security feature that detects if unofficial software has been installed on your phone. This helps prevent malicious attempts from accessing your data.
The Knox Warranty Bit detects if a non-Knox kernel has been loaded on the device. It is a one-time programmable bit e-fuse, which can only be turned from 0X0 to 0X1 (i.e. tripped). If a non-Knox boot loader or kernel has been installed on the device, Knox can no longer guarantee the security of the Knox container. As a result, the Warranty Bit is tripped to 0X1, indicating that this device can no longer use the Knox Workspace (container.)
If the Knox bit has tripped:
- A new Workspace can no longer be created on such a device.
- The data encrypted and stored in an existing Workspace can no longer be retrieved.
- Other Samsung services that utilize Knox security stop working (Samsung Pay, Secure Folder.)
Everything else outside the Workspace should be the same as before.
To check whether the Warranty Bit has tripped for new Samsung models:
- Connect a compatible USB cable to a powered-on PC.
- Power off the device.
- Once off, simultaneously press and hold the volume up and volume down buttons.
- While holding the buttons, connect the USB cable to the device.
- When a warning screen shows, release the buttons and press the volume up button.
- The Warranty Bit status (warranty void) is displayed on a screen among other parameters.
- Disconnect the USB cable, then simultaneously press and hold the volume up and power buttons for more than 7 seconds to exit and reboot the device.
Method for older devices with a home button
To check whether the Warranty Bit has tripped for older devices:
- Power off the device.
- Once off, simultaneously press the volume down, home, and power button.
- When warning screen is displayed, press the volume up button.
- The Warranty Bit status is displayed in upper-left corner.
If the Warranty Bit is tripped, the device displays Knox WARRANTY VOID: 0x01.
If that is the case, there is no way to revert the Warranty Bit and Knox won't work on this device. The only way to get the device back to its original settings is to replace the PBA (Printed Board Assembly) on the device; hardware replacement will be required.