ChatGPT answers calls on a normal SIM. No Twilio, just a $6 ESP32
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207 other launches read as similar to this one →
Details
- External ID
- 49978398
- Source
- HN
- Company
- —
- Product
- ChatGPT answers calls on a normal SIM. No Twilio, just a $6 ESP32
- Website domain
- youtube.com
- Launched
- Oct. 6, 2026
- Cohort
- —
- Upvotes
- 11
- Upvotes percentile
- 0.60
- Tags
- —
Enrichment
- Niche
- ai voice agents and platforms
- Vertical
- Horizontal
- Function
- Hardware & robotics
- Audience
- Developer
- AI stance
- AI-native
- Project type
- Hobby / open-source project
- Normalized one-liner
- esp32 hardware setup for answering phone calls with chatgpt
- Manually corrected
- False
Could you build this?
No Interfacing cellular audio directly from a physical SIM via a GSM modem module to an ESP32 microcontroller, streaming bi-directional audio to OpenAI's real-time API, requires embedded hardware engineering and low-latency digital signal processing.
What it would actually take: This setup requires custom embedded C/C++ (ESP-IDF or FreeRTOS) bridging an ESP32 with a cellular modem (like a SIM800 or SIM7600) over UART with AT commands. Audio must be sampled via I2S, encoded (e.g., PCM or Opus), streamed over WebSockets to OpenAI's Realtime Voice API, and decoded back in real-time with echo cancellation and jitter buffering under constrained microcontroller memory.
Discussion
3 comments analyzed.
Concerns raised: Only 1 call at a time, Requires an actual phone with SIM/subscriber agreement
Feature requests: Repository link
Competitors
Other products that read as similar to this one — 207 launches clear the similarity bar, closest 8 shown.
Attention rank: #74 of 208 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 342 days after the earliest competitor.
- ChatGPT-i18n · github · 2026-09-09 · 59 upvotes · similarity 0.56
- Claude and ChatGPT need a datacenter. This runs on my phone · hn · 2026-09-01 · 18 upvotes · similarity 0.53
- opencode-gpt-live · github · 2026-09-23 · 25 upvotes · similarity 0.49
- tunneldock · github · 2026-09-16 · 38 upvotes · similarity 0.48
- chatgpt-prism2api · github · 2026-09-24 · 15 upvotes · similarity 0.48
- GetClaudeProByAppleIO · github · 2026-10-06 · 52 upvotes · similarity 0.47
- Connect a voice agent to your phone as a Bluetooth headset with a ESP32 · hn · 2026-07-13 · 5 upvotes · similarity 0.45
- bettercallgpt · github · 2026-09-30 · 8 upvotes · similarity 0.45
Other launches for this product
- No other launches for this product.