OpenAI Verification Code by SMS: When It Is Required and How to Receive It (2026)
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Short answer: In 2026 OpenAI no longer asks for a phone number when you create an account or use ChatGPT. An OpenAI verification code is still sent by SMS in three situations: generating your first API key on platform.openai.com, a Codex login step-up, and risk-control triggers. OpenAI rejects VoIP, Google Voice and landline numbers, and delivers codes only by SMS or WhatsApp. SMS-Act provides one-time numbers on real mobile carriers for the SMS route: a flat 8 credits per attempt, with credits returned to your account automatically when no code arrives.
Got a text saying "Your OpenAI verification code is…"?
That message is sent when someone enters a phone number on an OpenAI verification screen. If you requested it, type the six digits into the page within about 10 minutes. If you did not request it, someone most likely mistyped their own number — ignore the message, do not share the code with anyone, and no further action is needed; a code that is never entered simply expires. OpenAI never delivers these codes by email or by voice call, so a phone call asking you to read out a code is not from OpenAI.
OpenAI's Official Requirements for Verification Numbers
What still triggers phone verification in 2026
Per the OpenAI Help Center, creating a new OpenAI account and using ChatGPT no longer require phone verification in most cases. Verification now appears mainly when generating your first API key on platform.openai.com, during Codex login step-up, and on risk-control triggers.
Before picking a number, check these two official rules — they decide which numbers simply will not work:
| Official rule | What it means for SMS verification |
|---|---|
| VoIP, Google Voice, landline and premium numbers are not supported (official article) | Internet phone numbers are rejected outright. SMS-Act provides real carrier SIM numbers, which are not in the rejected category |
| Codes are delivered only via SMS or WhatsApp — never by email or voice call (official article) | There is no "switch to email" fallback. When the page offers WhatsApp only, no SMS service can receive that code |
A bound number cannot be changed later
OpenAI does not support changing the phone number already bound to an account, and the number is released only 30 days after the account is deleted. SMS-Act numbers are one-time and recycled after 15 minutes, so they are meant for completing the verification in front of you. If you need a lasting SMS channel on the account, bind your own long-term number once verification succeeds.
When a Temporary Number Makes Sense for OpenAI
- You do not want your personal number bound to a developer account. OpenAI does not let you change a bound number later.
- Your own number is on a range OpenAI rejects — VoIP, Google Voice, landline, or an unsupported country code such as mainland China +86.
- Your own number keeps getting routed to WhatsApp, and you need the SMS route instead.
What SMS-Act provides — and what to expect
- Real carrier SIM numbers, not VoIP — the category OpenAI's own help article says it rejects does not apply
- Flat 8 credits per attempt, the same for every country
- Automatic credit return when no code arrives, so a failed attempt costs nothing
- An honest expectation: OpenAI is one of the strictest services on the platform. Plan on trying more than one number, and pick the country deliberately — the table further down reflects what has actually been working
How to Receive an OpenAI Verification Code with SMS-Act
Step 1: Register SMS-Act Account
- Visit SMS-Act Official Website
- Fill in email address and secure password to complete registration
- Click email verification link to activate account
- Log in and top up balance with Stripe
Step 2: Select OpenAI Verification Service
- Log in to SMS-Act console
- Search for and select "OpenAI" in the service list
- Choose a country from the "try first" row of the table below
- Click "Get Number" to purchase virtual phone number
- System will immediately assign an available overseas phone number
Step 3: Complete the OpenAI Verification
- Copy the phone number provided by SMS-Act
- Go to the OpenAI screen that is asking for a phone number (for example the API key page on platform.openai.com)
- Select the country code that matches your SMS-Act number
- Enter the number obtained from SMS-Act in the phone number field
- Click "Send Verification Code", OpenAI will send verification code
- Return to SMS-Act page to view received verification code
- Enter verification code in OpenAI page to complete registration
⚠️ Critical Update: OpenAI WhatsApp Verification Channel & Mitigation
What changed in OpenAI's risk control
Starting in 2025, OpenAI upgraded its account verification logic. According to the official OpenAI documentation, phone verification can now be delivered via SMS or WhatsApp (where the WhatsApp routing is available in your country). Which channel you receive is decided automatically by OpenAI's backend — users cannot manually switch it.
📌 Disambiguation: this is NOT the ChatGPT-on-WhatsApp shutdown
On January 15, 2026 OpenAI shut down the "use ChatGPT inside WhatsApp" product entry point (official announcement). That is a separate mechanism from the "WhatsApp verification channel" discussed in this article — the WhatsApp routing for receiving signup verification codes is still operational.
What triggers the WhatsApp channel?
Based on Q1 2026 field data from multiple virtual-number providers and community feedback, the WhatsApp channel is more likely to be triggered when:
- Certain European number ranges: German-speaking regions and the Nordics report higher trigger rates (Germany is not on the official 12-country WhatsApp list, yet WhatsApp-only cases are reported in the community)
- Multiple sign-ups from the same IP in a short window: once the anti-abuse system fires, OpenAI tends to downgrade you to the harder-to-bypass WhatsApp channel
- Datacenter IPs or shared VPN exits: flagged as high-risk sources
- Reused browser fingerprints: clearing cookies alone (regular incognito mode) is not enough to isolate fingerprint signals
⚠️ SMS-Act cannot receive WhatsApp verification codes
WhatsApp requires the number to first be registered on WhatsApp itself and remain online. As a result, no SMS verification platform — including SMS-Act — can receive WhatsApp verification codes with its temporary numbers. This is an inherent limitation of SMS reception services compared to physical SIM cards, and applies industry-wide.
If the OpenAI signup page shows "Send via WhatsApp" or only offers the WhatsApp option:
- ❌ Do not keep waiting — SMS-Act numbers cannot receive WhatsApp messages
- ✅ Cancel the order in your SMS-Act dashboard immediately — credits are returned to your account automatically
- ✅ Switch country and retry — choose a number range with a lower WhatsApp-trigger rate (see table below)
- ✅ Tighten your network environment in parallel (see the next section)
Recommended countries: lower WhatsApp-channel trigger probability
OpenAI has now published an official list of WhatsApp-channel countries — 12 in total: India, Indonesia, Malaysia, Turkey, the UAE, Egypt, Israel, Nigeria, Pakistan, Saudi Arabia, Ukraine, and Vietnam. Numbers from these listed countries are more likely to be routed to the WhatsApp channel and never receive the SMS. General recommendations:
| Priority | Countries | Why |
|---|---|---|
| ⭐ Try first | Thailand, France, Netherlands | Not on OpenAI's official WhatsApp list, and generally recommended ranges |
| Second choice | UK, USA, Canada | Not on the official list; results vary from day to day |
| ⚠️ Often fails | Philippines, Brazil, Germany, Italy | Not on the official list, yet these ranges tend to be less reliable — expect retries |
| ❌ Avoid | India, Indonesia, Malaysia, Turkey, Vietnam and the other listed countries | On the official WhatsApp-channel list — the SMS usually never arrives |
| ❌ Blocked | Mainland China +86, Iran, Cuba, North Korea, Syria | Rejected outright by OpenAI |
💡 On country choice
SMS-Act uses uniform pricing platform-wide (8 credits per attempt), so there is no "cheaper country" to trade off against — simply start from the top row. If a number fails, release it and move to the next country; the credits for the failed attempt return automatically.
Network environment tuning (lower the risk-control trigger rate)
✅ Recommended
- Use a residential proxy: avoid datacenter IPs and shared VPNs
- Keep "IP country = number country" consistent: choose a French number → use a French residential IP
- True fingerprint isolation: regular incognito mode only clears cookies; pair it with a browser fingerprint isolation tool or a brand-new clean browser profile
- One IP, one account: if you must reuse an IP, wait at least 24 hours between attempts
- Do not spam the "Resend" button: OpenAI extends the cooldown when it sees repeated requests
❌ Avoid
- Opening an "incognito window" inside a browser already logged into ChatGPT to register a new account (the fingerprint stays correlated)
- Using free or public VPNs (those exit IPs are repeatedly flagged)
- Attempting more than 3 sign-ups from the same IP within 24 hours
Source references: OpenAI VoIP policy · OpenAI Help — Phone verification collection
OpenAI Account Registration Precautions
Account Security Settings
- Strong Password: Use complex passwords containing uppercase and lowercase letters, numbers and special characters
- Email Verification: Ensure using valid and commonly used email address
- Two-Factor Authentication: Recommend enabling two-step verification to enhance account security
- API Key Management: Properly keep API keys and change them regularly
Network Environment Requirements
- Stable Connection: Ensure stable network connection to avoid interruption during registration
- Compliant Access: Use compliant network environment to access OpenAI services
- Browser Compatibility: Recommend using Chrome, Firefox or Edge browsers
- Clear Cache: If encountering problems, try clearing browser cache and cookies
Verification Code Receiving Tips
- Timely Check: OpenAI verification codes are usually valid for 10 minutes, please check promptly
- Refresh Page: If verification code not received, refresh SMS-Act page to check
- Re-obtain: If verification code expires, can re-obtain new phone number
- Customer Support: Contact SMS-Act online customer service for help when encountering problems
Frequently Asked Questions
Q: How long does it take to receive OpenAI verification code?
A: When OpenAI uses the SMS route, check your SMS-Act dashboard for the code as soon as you request it. If nothing has arrived after two to three minutes, waiting longer rarely helps — release the number (credits return automatically) and try a different country.
Q: What to do if OpenAI verification code not received?
A: Check three things in order. First, does the OpenAI page say the code was sent via WhatsApp? If so, no SMS service can receive it — release the number and switch country. Second, is the country on OpenAI's official WhatsApp list (India, Indonesia, Malaysia, Turkey, Vietnam and others)? Avoid those. Third, have you pressed Resend repeatedly? That extends OpenAI's cooldown. Release the number, move to a "try first" country, and retry once on a clean IP.
Q: Can one number register multiple OpenAI accounts?
A: Not recommended, OpenAI may detect repeated use, recommend using different phone numbers for each account.
Q: What payment methods does SMS-Act support?
A: Supports Stripe payments for convenient and secure top-up.
Q: How to ensure OpenAI account security?
A: Recommend enabling two-factor authentication, changing password regularly, not logging in on public networks, properly keeping API keys.
Q: OpenAI is asking me to receive the code via WhatsApp — can SMS-Act handle that?
A: Not currently. WhatsApp requires the number to be registered on WhatsApp first before it can receive messages, and SMS-Act's temporary numbers cannot satisfy that prerequisite — this is a shared limitation across all SMS verification platforms. The right move: cancel the current order in SMS-Act (credits are returned to your account automatically), switch to a "try first" country from the table above (Thailand, France or the Netherlands), and retry on a clean residential IP with a fresh browser profile.
Q: Why does my German number always get pushed to WhatsApp verification?
A: Germany is not on OpenAI's official 12-country WhatsApp-channel list, but 2026 German-speaking community reports (openai/codex #25798 and others) show German numbers still occasionally being routed to the WhatsApp channel. Switch to a better-performing range outside the official list — Thailand, France or the Netherlands (note: India and Indonesia are on the list and should be avoided) — paired with a same-country residential IP to significantly reduce the trigger rate.
Q: Is incognito mode enough to bypass OpenAI's risk control?
A: No. Standard browser incognito mode only clears cookies and local cache — it does not change your browser fingerprint (Canvas, WebGL, fonts, time zone, screen resolution, etc.). Recommended combination: residential proxy + a browser fingerprint isolation tool + matching country across IP and number.
Related Articles
- ChatGPT SMS Verification - Phone check inside the ChatGPT app and web signup flow
- OpenAI SMS Verification: Complete Guide - Country routing, WhatsApp channel and error codes explained
Receive Your OpenAI Verification Code
Pick a "try first" country, keep your IP in the same country as the number, and do not spam Resend. If a number fails, release it — the 8 credits come straight back — and move down the table.
Disclaimer
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