Is anyone utilizing "add special number" for incoming calls?

The 'Add Special Number' feature is designed to help identify calls by appending or prepending digits to the Caller ID. This feature was previously working in the old app, and currently the functionality may or may not work on the new app. This is because some carriers don’t support the ability to see special numbers. They may block or strip additional digits if they don’t match standard phone number formats.

We’d love to hear from other users—has anyone else successfully used this feature recently?

Additionally, there’s an open feature requests to bring this functionality back in the new app and to be available to all carriers. If this is important to you, consider upvoting it here:

Add Special Number to New RC PC Application! – RingCentral Ideas
Add special number to incoming caller ID should be available to all carriers – RingCentral Ideas