If you modify the property which is bound to the Value of the RadNumericInput, through the ViewModel for example, you are able to set a value which is not in the range of minimum/maximum.

Samsung numeric keyboards insert minus sign after the second stroke of a multi-functional button. This restricts Samsung end users to directly insert minus in the RadNumericInput because the control reacts on the beforehand entered decimal separator.

We should improve our logic in order to handle this type of input.

Available in the 2018 R2 SP release.