# Change zvonok call verification
After May 27, the Zvonok service will block number verification that was
not set up as part of the phone number verification campaign. This PR
modifies the number verification process.
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## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] Added the relevant release notes label (see labels prefixed w/
`release:`). These labels dictate how your PR will
show up in the autogenerated release notes.
Co-authored-by: Innokentii Konstantinov <innokenty.konstantinov@grafana.com>
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