Which RC Api shall I use to extract a phone number from contact list?
I am not sure what exactly your point is but I beleive your question and requirement is simmiler to this
Using the RingCentral Phone for Desktop, you can dial or receive test calls, send and receive test SMS or Fax messages in your sandbox environment.
Download RingCentral Phone for Desktop:
Tip: switch to the "sandbox mode" before logging in the app:
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