Voice AI Accent Recognition Suddenly Degraded – Same Agent & Same Voice (Cimo) Now Performing Poorly

Support Help
1

My previously well-performing voice AI agent using the Cimo voice has suddenly lost accent understanding and is now causing major business impact.

Hello Retell AI Team,

I am creating this topic to report a serious regression issue with my voice AI agent that is actively affecting my business.

Earlier, my AI agent using the Cimo voice was working extremely well and was able to understand different accents clearly. With the same agent configuration and same voice, the performance has now degraded badly. The agent is no longer able to understand accents properly and frequently misses or misinterprets user input.

This change happened without any major changes from my side, which strongly suggests a backend, STT, or voice-related issue.

Issue Summary

  • Same AI agent that worked well earlier is now failing

  • Accent recognition has significantly worsened

  • Calls are being misunderstood or dropped

  • Overall call quality has degraded

What I Need Help With

  1. Please review my latest deployed bot named: [PUT BOT NAME HERE]

  2. Investigate why the Cimo voice performance has changed

  3. I want to continue using the same Cimo voice — I do not want to switch voices

  4. Please share technical feedback on what changed and how to fix it

Business Impact

I am using Retell AI in live production for my business, and this issue has caused:

  • Missed calls

  • Lost clients

  • Revenue loss

  • Wasted spend on voice usage and configuration changes

I have already paid for voices and made multiple adjustments specifically for business usage. If this issue cannot be resolved, I will need to request a full refund and migrate to another platform, as the losses are becoming significant.

I request the team to please treat this as high priority and help resolve it as soon as possible.

Thank you,

2

Hello @Techora_Ai

Can you share a call id before and after the voice goes bad.