A real phone number for ChatGPT
People who use ChatGPT for work often prefer to keep their personal SIM off yet another account, and a separate real mobile number they control for as long as they renew it gives them a stable number for verification and sign-in codes. SMS Hallo gives you a real mobile number in the country of your choice, so you can create and secure your ChatGPT account without sharing your personal number.
The ChatGPT code lands in your SMS Hallo inbox within seconds and is ready to copy with one tap. Because you keep the number for as long as you like, you can always receive new login codes and recover your account later.
Every number includes unlimited incoming SMS, 500 outgoing SMS and 1,000 calling minutes a month, plus unlimited incoming calls, from just $1.80 a month (billed yearly).
And it's risk-free: if the number doesn't work with ChatGPT, replace it free within 7 days or get a 100% refund.
Every number includes
- Unlimited incoming SMS — Receive every text and verification code, with no monthly cap.
- 500 outgoing SMS / month — Reply and send texts from your number, anywhere in the world.
- 1,000 calling minutes / month — Make calls from your number with a generous monthly allowance.
- Unlimited incoming calls — Answer calls on your number as often as you like.
- Keep it as long as you like — Renew monthly or for up to 12 months at a time. The number stays yours.
- 7-day money-back guarantee — Not used it yet? Get a full refund within 7 days, no questions asked.
- 7-day replacement guarantee — Doesn't work for you? Swap it for another number in the same country, free, in one click.
- Works everywhere — or 100% refund — WhatsApp, Facebook, Telegram, Google and more. If it doesn't work, you get every cent back.
Often yes, but only in the situations where OpenAI actually asks for a phone number, and OpenAI decides which numbers it accepts. OpenAI's help center says phone verification is not generally required to use ChatGPT; it comes up for Codex in the ChatGPT desktop app, for your first API key, for phone-only sign-ups in some countries and for text-message sign-in protection. If the code never reaches your SMS Hallo real mobile number, swap it free within 7 days or get a 100% refund.
How ChatGPT verifies your number
OpenAI's help center states that phone verification is not generally required to create an OpenAI account or to use ChatGPT. Most people sign up with an email address or with Google, Apple or Microsoft and never see a phone prompt. There are specific cases where OpenAI does ask: you may be asked to verify a phone number when you open Codex in the ChatGPT desktop app, and phone verification is required on platform.openai.com before you generate your first API key (later keys don't need it).
When OpenAI does verify a number, the code goes out by SMS or, in countries where it is offered, by WhatsApp. OpenAI says codes can't be sent by email or by phone call, and that an email address or authenticator app does not replace this step. OpenAI also says it does not accept landlines, VoIP numbers, Google Voice or premium numbers, because those types are often linked to fraud and abuse, and that it only supports mobile numbers over SMS. SMS Hallo numbers are real mobile numbers in each country's local mobile format, but acceptance is always OpenAI's decision.
OpenAI limits how often one number can be used. According to its help center, a phone number can be used for phone verification at most three times, and once a number has been used for verification it can be blocked from creating further accounts. OpenAI also notes that recycled or reused numbers can trigger a 'Too many signups with this number' message even if you never used the number yourself. If that happens with an SMS Hallo number, use the free replacement within 7 days rather than trying again and again.
Separately, OpenAI offers phone-only ChatGPT sign-ups, which it says are mostly rolled out to new users in the United States, the Netherlands, France, Spain, the United Kingdom, Poland, Germany, Japan, India, Pakistan, Algeria, Uzbekistan and Ukraine. On those accounts, password resets happen by SMS and must be done from a device you have already used to log in. Any OpenAI account can also turn on multi-factor authentication with a 6-digit code sent by SMS or WhatsApp, alongside authenticator apps, push approvals and passkeys. In all of these cases the number keeps mattering after sign-up, which is why renewing it is important.
How to verify ChatGPT with an SMS Hallo number
- Check where the prompt appears — Confirm that OpenAI is really asking for a number: the Codex screen in the desktop app, the first API key on platform.openai.com, a phone-only sign-up, or turning on text-message sign-in codes. If you are not asked, you don't need a number for ChatGPT.
- Pick your own country — Choose a number from the country where you live and use ChatGPT. A number from another country does not change where OpenAI offers its services, and SMS Hallo's Acceptable Use Policy does not allow using numbers to create extra accounts or to exceed an app's limits.
- Rent the number — Rent a real mobile number on SMS Hallo and pay with USDT or USDC. Plans start from $1.80 per month on the 12-month plan, and the number appears in your dashboard as soon as payment is confirmed.
- Request the code by SMS — Enter the number with the correct country code. If the screen offers text message or WhatsApp, choose text message so the code lands in your SMS Hallo inbox, then copy it with one tap.
- Add a backup and keep the number — Add an authenticator app or passkey in Security and login, add an email address if you signed up by phone, and switch on auto-renew for the number.
Troubleshooting ChatGPT verification
No SMS arrives
Wait a couple of minutes and request a new code once. Check that you chose text message rather than WhatsApp. If nothing arrives, swap the number free within 7 days or request a 100% refund.
"Too many signups with this number"
OpenAI says this can happen with recycled numbers that were used by someone else. Retrying won't help; use the free replacement within 7 days for a different number in the same country.
Number type not supported
OpenAI decides which numbers it accepts and does not take landlines, VoIP or premium numbers. If it rejects your SMS Hallo number, request a replacement or a 100% refund.
The code goes to WhatsApp
In some countries OpenAI sends the code on WhatsApp. That only reaches a WhatsApp account registered on the number, not your SMS inbox, so look for the text-message option first.
Code rejected
Codes expire. Request one fresh code, then paste the newest one straight from your SMS Hallo inbox without retyping it.
Lost access to sign-in codes
Choose another enabled method when you sign in. If none works, contact OpenAI support; keeping the number renewed avoids this situation.
Which country to choose for ChatGPT
Choose a number from the country where you actually live and use ChatGPT. That keeps your account consistent and matches OpenAI's own availability rules; a number from somewhere else does not change which services OpenAI offers to you, and SMS Hallo does not support using numbers for that purpose. If you are in one of the countries where OpenAI offers phone-only sign-up, a local number also lets you use that option. No country receives every code, so if one number doesn't work, use the 7-day replacement or the refund.
ChatGPT number by country
ChatGPT number FAQ
Do I need a phone number to use ChatGPT?
Usually not. OpenAI says phone verification is not generally required for ChatGPT. It is asked for Codex in the desktop app, your first API key, phone-only sign-ups in some countries, and text-message sign-in codes.
Can OpenAI call me with the code instead?
No. OpenAI says codes are sent by SMS or, where available, WhatsApp, and not by email or phone call.
Is an SMS Hallo number a VoIP number?
No. SMS Hallo rents real mobile numbers in the local mobile format of each country. OpenAI still makes the final decision on which numbers it accepts.
Can I use one number for several OpenAI accounts?
OpenAI caps each number at three verifications. SMS Hallo is meant for your own account, and its Acceptable Use Policy forbids creating accounts in bulk.
Will a foreign number let me use ChatGPT where it isn't offered?
No. Pick a number from the country where you live. SMS Hallo is for privacy and a second number, not for changing where a service is available.
What if I stop renewing the number?
It may be rented to someone else, and they could receive codes meant for your account. Keep it renewed and add an authenticator app as a backup.
Can I get my money back if it doesn't work?
Yes. If the number doesn't work with ChatGPT, request a 100% refund within 7 days, or swap it free for another number in the same country.
Can I use SMS Hallo numbers for ChatGPT?
Yes. SMS Hallo numbers are real mobile numbers and can be used to sign up for and verify ChatGPT.
Which country should I choose for ChatGPT?
Any of our 181 countries works. Many people choose the country where they live or where their ChatGPT audience is. Popular choices are the United States, United Kingdom, Germany and Canada.
Can I receive future ChatGPT codes on the same number?
Yes. The number is yours for as long as you keep renting it, so password resets and new logins keep working.
Is the number shared with anyone else?
No. While you rent it, the number and its messages are yours alone.
What if the number doesn't work with ChatGPT?
Replace it free with another number within 7 days, or get 100% of your money back. 100% refund if it doesn't work: if your number doesn't work with the app you rented it for — for example the verification code never arrives — tell us within 7 days and we refund 100% of what you paid for the number.