How to set incoming text messages and phone call restrictions with Knox Service Plugin
Last updated May 19th, 2026
Categories:
Environment
- Knox Manage
- Knox Service Plugin
- Knox 3.4.1 and higher
Overview
With Knox Service Plugin, the Blocklist Incoming SMS restriction and Blocklist Incoming Call restriction policies provide the option to block specific mobile numbers from contacting the user through SMS text messages or phone calls.
How to block incoming text messages and phone calls
To restrict incoming text messages and phone calls with Knox Service Plugin:
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On the Knox Manage console, go to Profile.
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Create a new profile or modify an existing profile.
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Expand the Samsung Knox > Knox Service Plugin policy drawer and set the following policies in Device-wide policies:
Policy Value Enable device policy controls True Call and Messaging control > Enable call and messaging controls True Call and Messaging control > SMS Controls > Blocklist Incoming SMS restriction Enter a comma-separated list of a mobile numbers to restrict. Some supported patterns:
- To block all numbers, enter
.* - To block numbers starting with "XXX", enter
.*XXX - To block numbers ending with "XXX", enter
XXX.*
Call and Messaging control > Call Controls > Blocklist Incoming Call restriction For more information on how to restrict incoming text messages and phone calls with Knox Service Plugin, see PhoneRestrictionPolicy.
- To block all numbers, enter
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Click Save & Assign to save your changes and assign the profile to your device group.
How to allow incoming text messages and calls from certain phone numbers
Once you set the policies in the previous section, all calls and text messages will be blocked. If you also need to define a selective list of numbers to allow through, you can configure the following additional Device-wide policies:
| Policy | Value |
|---|---|
| Call and Messaging control > SMS Controls > Blocklist Incoming SMS exception | Enter a comma-separated list of mobile numbers to exempt from the blocklist. |
| Call and Messaging control > Call Controls > Blocklist Incoming Call exception | Enter a comma-separated list of mobile numbers to be exempt from a blocklist. |
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