OpenAI & ChatGPT Verification

Verify OpenAI & ChatGPT.
Zero VoIP Blocks.

OpenAI rejects virtual VoIP numbers during API developer account creation and ChatGPT Plus signups. SecondSim provides a genuine UK mobile network identity on Vodafone so you can pass SMS verification instantly.

Get OpenAI eSIM (£5.99/mo) How It Works ↓
Carrier-grade network • Runs on Vodafone • 4,000+ UK businesses • No ID checks • Live in 60 seconds
Step-by-Step Architecture

Passing OpenAI's Security Firewall.

Why SecondSim succeeds where Google Voice, TextNow, and virtual numbers fail.

STEP 01

Instant Digital eSIM Setup

Receive your digital eSIM QR code within 60 seconds of checkout. Scan it directly onto your iPhone or Android handset. No physical SIM delivery wait.

STEP 02

Satisfy OpenAI HLR Checks

When OpenAI performs an automated telecom lookup during API signup, SecondSim responds as an authentic Vodafone UK mobile SIM (MNC native), receiving the OTP instantly.

STEP 03

Deploy to WhatsApp Business

Register your new number on the WhatsApp Business app. Hook inbound queries via Make, n8n, or Voiceflow directly to your GPT-4o API assistant.

OpenAI Ecosystem Compatibility

One Line for Your OpenAI Stack.

Whether you are verifying developer platform accounts or deploying conversational bots, SecondSim mobile identities are 100% compatible across the OpenAI ecosystem:

OpenAI Developer Console
GPT-4o / GPT-4 Turbo
ChatGPT Plus & Team
OpenAI Assistants API
Make.com Webhooks
n8n Workflow Nodes
Voiceflow & Botpress
CrewAI & LangChain
Simple Pricing

Get Your OpenAI eSIM Profile.

Instant delivery. Rolling 30 days. No minimum contract.

Monthly Plan

Flex Line

£5.99/mo
inc. VAT • Rolling 30 days • Zero contract
  • Real UK 07 Mobile Number (Non-VoIP)
  • OpenAI & ChatGPT 2FA with a Real UK Mobile Number
  • Unlimited UK Incoming/Outgoing Calls
  • Unlimited UK SMS Messages
  • Instant eSIM — Live in 60s
Choose Flex
RECOMMENDED
Annual Saver

Annual Line

£59.99/yr
Save 17% vs monthly • £5.00/mo equiv
  • Everything in Flex Line
  • 2 Months Free vs Monthly
  • OpenAI & ChatGPT 2FA with a Real UK Mobile Number
  • Free PAC Number Porting
  • Priority Developer Support
Choose Annual
Data Intensive

Pro Unlimited Data

£19.99/mo
inc. VAT • High volume autonomous agents
  • Unlimited UK High-Speed 5G Data
  • Unlimited UK Calls & SMS
  • Full 5G Mobile Hotspot & Tethering
  • No Speed Throttling
  • Cellular Failover for Automation Servers
Choose Unlimited
100% money-back guarantee If your number fails OpenAI or ChatGPT verification within 7 days, receive an immediate full refund.

People who finally switched off

"Running a salon meant clients contacting me 24/7. There's no more evening anxiety when my phone buzzes."
Caroline — The Basement, Urmston
"I've framed it to clients as a priority hotline. Nothing gets lost, and I get my evenings back."
That Girl Friday — business support
"I juggle a job and two side-gigs without carrying a second phone or signing a contract."
Mike — The Braai Guys
Network Benchmark

SecondSim vs VoIP & Burner SIMs.

Comparison for developers building AI agents and verifying platform developer accounts.

Metric SecondSim Virtual VoIP Apps Supermarket PAYG SIMs
OpenAI API Verification ✓ 100% Guaranteed ✕ "Number not supported" ✓ Supported
HLR Protocol Verification ✓ Tier-1 Mobile Network Code ✕ Software VoIP flag ✓ Physical MNO
WhatsApp Business Compatibility ✓ Full Native Support ✕ High suspension risk ✓ Supported
Activation Speed ✓ 60 seconds • Digital eSIM Instant (unusable) 2–3 postal days
Number Retention ✓ Permanent • Active line ✕ Lost if unrenewed Requires regular top-ups
OpenAI Questions

Frequently Asked Questions.

OpenAI runs real-time Home Location Register (HLR) carrier checks to block automated bot signups. Because VoIP numbers lack a valid Mobile Network Code (MNC) and are registered as virtual routing, they fail telecom fraud heuristics. SecondSim provides genuine UK mobile routing on Vodafone that satisfies these checks.
Yes. SecondSim numbers are authentic UK 07 mobile lines. They receive SMS 2FA tokens reliably from OpenAI Platform (API keys), ChatGPT consumer logins, and Anthropic.
By installing your SecondSim eSIM profile, you can register a dedicated WhatsApp Business account. Inbound customer messages can then be captured via webhooks (e.g. Make, n8n, Voiceflow) and routed directly to your OpenAI Assistant.
We back every line with a 100% money-back guarantee. If you are unable to verify OpenAI or ChatGPT within 7 days, simply email support for an immediate full refund.
Built for OpenAI Developers

Get your OpenAI eSIM profile in 60 seconds.

Clean UK 07 carrier mobile line on Vodafone. Designed for OpenAI API and ChatGPT accounts.

Get your eSIM (£5.99/mo) View all AI hubs