AI is glitching REALLY bad when repeating phone numbers back to customers, multiple times during a call. This issue is not a one off occurance. CALL ID: c2dd70a9-b5e2-43aa-8034-7e6ad8487e8c TIME STAMPS: 01:23 01:55 02:36

To reduce glitches when the AI speaks phone numbers, update your prompts to spell out each digit in words. For example:

Prompt: "Your callback number is one two three, four five six, seven eight nine zero."

This helps the AI produce smoother, more natural-sounding phone numbers and avoids robotic or glitchy output. Adjust your prompt templates accordingly for best results. [See Vapi's best practices for more details.](https://docs.vapi.ai/prompting-guide#common-issues) Source: - [Vapi Prompting Guide – Common Issues](https://docs.vapi.ai/prompting-guide#common-issues)

We already have this in the prompt "Read each digit individually and slowly with pauses: "zero-four-one-nine... seven-seven-one... nine-nine-two" and it does generally follow this on the first time it reads number, but then each time afterward it glitches and seems to happen a lot with this particular AI.

Thank you for clarifying that you are already spelling out each digit with pauses in your prompt. Since the glitch occurs on repeated readings and is not resolved by prompt changes, the best next step is to report this as a potential model or platform issue. Please contact Vapi support directly and include your call ID and timestamps so they can investigate the specific behavior in detail. Source: - [Vapi Prompting Guide – Common Issues](https://docs.vapi.ai/prompting-guide#common-issues)

This issue occur, due to voice provider issues, asynchronous functions disrupting speech, or transcription mismatches, so switching providers, adjusting prompts could help..

Try switching to a different voice provider for your assistant to see if the phone number glitch resolves. For example, if you're currently using "Vapi Voices," update your configuration to use "ElevenLabs" or another supported provider. This can often address issues caused by provider-specific speech synthesis glitches. If the problem persists after switching, please report it to Vapi support with your call ID and timestamps for further investigation. Sources: - [Vapi Prompting Guide – Common Issues](https://docs.vapi.ai/prompting-guide#common-issues) - [Vapi Voices Documentation](https://docs.vapi.ai/providers/voice/vapi-voices) - [ElevenLabs Integration](https://docs.vapi.ai/providers/voice/elevenlabs)

Message marked as helpful by @! AetherMind! 🎉

checking if this is resolved/solved for you?

@Kings_big💫 we've implemented the recommendation and now just monitoring to determine if resolved.

Hey Liv, a gentle reminder to continue this thread.