Once the device selection matrix file is uploaded, if any device needs to be replaced, the Cartos application will auto-recommend an appropriate replacement device. Also, a device can be replaced with an existing or a new device manually.
Auto recommending a Device from Device Selection Matrix
To auto-recommend a device from the device selection matrix list:
Go to Transition state and select device(s) and choose Replace outcome.
Cartos automatically recommends the suitable replacement device from the device selection matrix list along with a device recommendation successful message. The auto-recommended device details are auto-saved and are displayed in the Asset Property window as shown in the below image.
Recommending a Device Manually from Device Selection Matrix
If users are not satisfied with the recommended device from DSM, they can manually recommend a device. To manually recommend a device from the device selection matrix list:
- Go to Transition state and select device(s) and choose Replace outcome.
The Asset Property window displays the properties of the replacing device. - From the Asset Property window, click the Remove Recommendation icon
to remove the auto-recommendation. - Assign properties manually to this unknown device using any one of the methods suggested for assigning properties to a device. For more information, see assigning properties to real devices.
If Fleet Designers want to go back to auto recommendation mode, they can click on Suggest a Device icon 
from the Asset Property Window. The recommended device properties will be displayed in the Asset Property window and auto saved.
📓 - Verify if the recommended device band details are accurate in the device selection matrix report.
The below table provides various conditions of device selection matrix:
| Scenarios | Message Displayed |
| Recommended device is available in device selection matrix. | “Asset(s) recommendation completed” |
| Recommended device is not available in device selection matrix. | “We did not find any recommended asset in device selection matrix” |
| Recommended device is available in device selection matrix, but the device information is not available. | “We found the recommended device but did not find any information about the recommended device in our system” |
| Recommended device does not belong to the current country which is displayed in the breadcrumb. | "This device is unsupported in current country" |