It talks over your callers.
- Why it happens
- Turn detection tuned for a quiet room, not a car, a kitchen or someone who pauses to think.
- How I fix it
- Tune when the agent decides you’ve finished, and let callers interrupt it cleanly.
For agencies that sell voice AI agents
Voice agents that work on real calls.
Your agent works in the demo, then talks over callers, goes quiet or says it booked when it didn’t. I fix that. One agent, €1,500 fixed. You pay when it passes the test we agreed.
- Fixed price, no hourly billing
- Done in 3–5 days
- Pass/fail test agreed up front
Mahad NaveedApplied AI engineer · Co-Founder & CTO at BIMxAI
Talk to my demo agent
Ask it what a fix costs, or try interrupting it.
Your browser will ask for your microphone. Calls are recorded so I can improve the agent. Privacy
The problem
Where voice agents break on real calls
Your client doesn’t care why. They just hear it. These are the four I fix most.
It goes quiet for two seconds.
- Why it happens
- Speech-to-text, the model and the voice waiting on each other one by one, or a prompt that’s far too long.
- How I fix it
- Stream each step, trim the prompt and add a short filler line while a tool runs.
It says it booked, but the calendar is empty.
- Why it happens
- A tool call that failed silently, and the agent confirmed anyway.
- How I fix it
- Check every tool result before the agent says “done”, and add a fallback when the calendar doesn’t answer.
It worked yesterday.
- Why it happens
- A prompt or model change with no test calls behind it.
- How I fix it
- A set of scripted test calls that runs before every change, so you hear about breaks before your client does.
Case studies
Real agents, real fixes
What broke, what I tried and what worked, from client agents. Clients stay anonymous.
The agent knew the opening hours. It couldn’t tell if the office was open.
A client’s phone agent read the opening hours back perfectly, then forwarded calls at the wrong times. A bigger model fixed it but made every reply 1.5 seconds slower. The fix kept the model, the speed and the cost.
- Latency kept. GPT-5.1 took 2.1 s
- 0.6 s
- Model and API cost per call
- Same
- Small workflow, on the client’s own n8n
- 1
The flow had a node for everything. That was the problem.
A receptionist agent was split into 12 nodes, one for each department and request. It passed every test, then went live. Replies took over 3 seconds and the agent started making things up. The fix was fewer nodes, not more.
- Nodes in the flow, before and after the fix
- 12 → 4
- Latency on live calls before the fix
- 3 s+
How it works
From broken demo to a passing test
One agent, one fixed price, and a test we agree on before I start.
Audit
Send me your demo link. I test it and send you a 3-minute video of what breaks and how I’d fix it.
Agree the test
Which calls are in scope, and what passes. For example: “reply under 1 second on 20 test calls” or “20 out of 20 bookings land in the calendar”.
Fix
I fix the agent and run the test calls until it passes.
Handover
Before and after recordings, the test results and a short note on what changed.
Voice agent fix
€1,500 fixed, per agent
No hourly billing and no surprises. The audit comes first and is free.
Start with a free auditYou pay when it passes the test we agreed.
- A fix for one agent: talking over callers, slow replies, failed bookings or tool calls, prompt clean-up
- A written test agreed before I start, like “reply under 1 second on 20 test calls”
- A set of scripted test calls, run until the agent passes
- Before and after recordings, the test results and a short note on what changed
- Delivered in 3–5 days
About
I make things work after the demo
I’ve been building software since 2019, when I started taking web projects on Fiverr. Then I spent two years in security at a digital bank, where I learned how systems break. After that I was CTO at three startups, and today I’m Co-Founder & CTO at BIMxAI.
Voice agents are the hardest thing I’ve shipped. In a demo, nobody interrupts, the Wi-Fi is perfect and the calendar always answers. On real calls, none of that holds. Closing that gap is my job.
- Building software since 2019
- 2 years of security at a digital bank
- CTO at 3 startups
- Antler Entrepreneur in Residence (2025)
- Voice agents on Pipecat, Vapi and Retell
- Certified Ethical Hacker (CEH)
FAQ
Questions agencies ask
Is the audit really free?
Yes, for the first few agencies. Send me your agent’s demo link and I send back a 3-minute video showing what breaks and how I’d fix it. No call needed.
Which platforms do you work with?
I’ve built voice agents on Pipecat, Vapi and Retell. If yours runs on something else, send the demo link anyway: the free audit shows whether I can fix it before you pay anything.
When do I pay?
You pay when it passes the test we agreed. We write the test down before I start, then I fix the agent and re-run the test calls until it passes. Nothing is due before that.
What do you need from me?
A demo link for the agent, and access to its prompt, tools and platform settings for the fix. I work with test calls and fake data wherever I can. Your client’s data stays yours.
What about time zones?
I work from Islamabad (UTC+5), in English. For US agencies, that usually means the fix is ready when you wake up.
Get a free audit of your voice agent
Send me your agent’s demo link. I’ll test it and send you a 3-minute video showing what breaks and how I’d fix it. Free for the first few agencies.
This opens your email with the link filled in. No call, no commitment.
Rather talk first? Book a 15-minute callOr email [email protected]