Call logs should go back at least 90 days please.
Please email the backend team and check with them on the issue
No, dev support cannot do anything to extend the data retention. An account admin can set the range for themselves within the compliance and non-compliance time range.
Here is RingCentral data retention policy a an compliance.
https://support.ringcentral.com/s/article/2178?language=en_US
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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