1# Telephony Subsystem Changelog
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5## cl.telephony.1 Radio Module API Change
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8### Changed the `isNrSupported` API in the radio module of the telephone subsystem:
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10NR is a proper noun and must be capitalized.
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12You need to adapt your application.
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16**Change Impacts**
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18The JS API needs to be adapted for applications developed based on earlier versions. Otherwise, relevant functions will be affected.
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22**Key API/Component Changes**
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24- Involved APIs:
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26  isNrSupported(): boolean;
27  isNrSupported(slotId: number): boolean;
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29- Before change:
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31```js
32function isNrSupported(): boolean;
33function isNrSupported(slotId: number): boolean;
34```
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36- After change:
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38```js
39function isNRSupported(): boolean;
40function isNRSupported(slotId: number): boolean;
41```
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45**Adaptation Guide**
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47Use the new API. The sample code is as follows:
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49```js
50let result = radio.isNrSupported();
51console.log("Result: "+ result);
52```
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54
55```js
56let slotId = 0;
57let result = radio.isNRSupported(slotId);
58console.log("Result: "+ result);
59```
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