Common ChatGPT (OpenAI) errors
- “This phone number has been used too many times”
- “Unsupported country”
- No code
Each has a fix in the ChatGPT (OpenAI) verification guide.
ChatGPT (OpenAI) verification+378
San Marino phone number for ChatGPT (+378)
Yes — a real San Marino mobile number (+378) can receive the ChatGPT (OpenAI) 6-digit code by SMS. One ChatGPT (OpenAI) code on a +378 number costs $0.45; a +378 number you keep costs from $1.80/month on the 12-month plan.
- 6-digit code by SMS to +378
- 6th cheapest of 47 countries in Europe for ChatGPT
- Real mobile line — not VoIP
- Works with ChatGPT (OpenAI) — 7-day replacement guarantee
Pricing
From$1.80/mo
on the 12-month plan
Choose 1, 3, 6 or 12 months at checkout — every term price is shown there.
See plans & buyChatGPT (OpenAI) code (single-use)$0.45
Every term (1, 3, 6 or 12 months): unlimited incoming SMS & calls, 500 SMS + 1,000 minutes out every month. Renew as long as you want. Buy with crypto — no wallet top-up needed.
Example numbers
- +378 XX 944 5XXin stock
- +378 XX 633 1XXin stock
- +378 XX 636 5XXin stock
Digits are masked. The full number is shown once it is assigned to your account.
Key facts
ChatGPT (OpenAI) with San Marino numbers: at a glance
- ChatGPT (OpenAI) code (single-use)
- $0.45 per code
- Price rank
- Cheaper than 143 of 191 countries for ChatGPT (OpenAI)
- Rank in Europe
- 6th cheapest of 47 countries in Europe
- Code format
- 6-digit code
- Delivered by
- SMS
- Number format
- +378
- Stock
- 32 numbers in stock
- Among San Marino apps
- 95th cheapest of 113 apps
- Local time
- UTC+1 (UTC+2 in summer)
Cheapest countries for ChatGPT (OpenAI) right now: Lesotho $0.20 · Malaysia $0.20 · Mauritania $0.20.
Prices as of October 15, 2026; stock changes through the day. Full list: OTP prices by app and country.
Compare nearby countries for ChatGPT (OpenAI)
At $0.45, San Marino is the 6th cheapest of 47 countries in Europe for ChatGPT (OpenAI). Ukraine (+380) is the cheapest nearby at $0.25.
| Country | Dial code | ChatGPT (OpenAI) code | vs San Marino | Stock |
|---|---|---|---|---|
| United Kingdom | +44 | $1.51 | +$1.06 | In stock |
| Germany | +49 | $1.76 | +$1.31 | In stock |
| Netherlands | +31 | $1.56 | +$1.11 | In stock |
| France | +33 | $1.46 | +$1.01 | In stock |
| Spain | +34 | $1.01 | +$0.56 | In stock |
| Poland | +48 | $0.76 | +$0.31 | In stock |
| Sweden | +46 | $1.39 | +$0.94 | In stock |
| Albania | +355 | $0.86 | +$0.41 | In stock |
Step by step
How to verify ChatGPT (OpenAI) with a San Marino number
One ChatGPT (OpenAI) code on a +378 number costs $0.45 — the 6th cheapest of 47 countries in Europe. Full ChatGPT (OpenAI) walkthrough and troubleshooting: ChatGPT (OpenAI) verification guide.
Get your San Marino number
Sign up with an email, top up with USDT or USDC and pick San Marino: a plan to keep the +378 number, or a single-use ChatGPT (OpenAI) OTP number ($0.45).
Open ChatGPT (OpenAI)
Go to the phone step during sign-up or when creating API keys on the OpenAI platform.
Enter the +378 number
Select San Marino (+378) in ChatGPT (OpenAI)'s country picker, then paste the digits your dashboard shows after +378 into ChatGPT (OpenAI).
Enter the ChatGPT (OpenAI) code
ChatGPT (OpenAI) sends a 6-digit code by SMS. SMS codes appear in your PhoneBorn dashboard next to the +378 number; type the code into ChatGPT (OpenAI) to finish.
Tips for San Marino numbers
- Only need one code and the country doesn't matter? Ukraine costs $0.25 for ChatGPT (OpenAI), against $0.45 here.
- Keep your email and number consistent between ChatGPT and the API platform.
Why use a San Marino number for ChatGPT (OpenAI)?
Day-to-day life in San Marino runs on WhatsApp, Facebook and Instagram, yet ChatGPT (OpenAI) remains the app for an OpenAI account registered in a supported country. A +378 number keeps that account tied to the country without using your personal SIM.
Businesses registered in San Marino: Companies based in the republic use a +378 number to show a genuine Sammarinese presence rather than an Italian one.
OpenAI can ask for the phone again for API access, billing or security reviews.
Local context
San Marino at a glance for ChatGPT users
- Capital
- San Marino
- Population
- 34,000
- Languages
- Italian
- Currency
- Euro (EUR)
Apps people use most in San Marino
- TikTok
- YouTube
- Satispay
| App | OTP price | vs ChatGPT | Guide |
|---|---|---|---|
| Google / Gmail | $0.38 | −$0.07 | Google / Gmail guide |
| $0.40 | −$0.05 | WhatsApp guide | |
| Telegram | $0.45 | same | Telegram guide |
| $0.35 | −$0.10 | Instagram guide | |
| $0.33 | −$0.12 | Facebook guide | |
| TikTok | $0.33 | −$0.12 | TikTok guide |
| Discord | $0.30 | −$0.15 | Discord guide |
| X (Twitter) | $0.35 | −$0.10 | X (Twitter) guide |
| Binance | $0.55 | +$0.10 | Binance guide |
| Amazon | $0.35 | −$0.10 | Amazon guide |
| Apple ID | $0.40 | −$0.05 | Apple ID guide |
| Signal | $0.33 | −$0.12 | Signal guide |
Works with ChatGPT (OpenAI) — backed by our 7-day replacement guarantee
If your San Marino number doesn't work for ChatGPT (OpenAI) or any other app you need within 7 days of purchase, replace it with a new San Marino number for free — instantly from your dashboard, up to 3 times, no questions asked.
Never used it (no SMS or call)? Take a full refund to your PhoneBorn balance within 7 days instead.
FAQ
San Marino number for ChatGPT (OpenAI): FAQ
How much is a ChatGPT (OpenAI) code with a San Marino number?
A single-use ChatGPT (OpenAI) code on a San Marino (+378) number costs $0.45 (as of October 15, 2026). That makes a San Marino number the 6th cheapest of 47 countries in Europe for ChatGPT (OpenAI), and cheaper than 143 of the 191 countries where ChatGPT (OpenAI) codes are sold. The cheapest option nearby is Ukraine (+380) at $0.25. Among the 113 apps we sell San Marino codes for, ChatGPT (OpenAI) is the 95th cheapest.
Can I use a San Marino number for ChatGPT (OpenAI)?
Yes. ChatGPT (OpenAI) expects a real mobile number, and every San Marino (+378) number we sell is one. If ChatGPT (OpenAI) turns yours down, the 7-day replacement guarantee swaps it for another San Marino number; a single ChatGPT (OpenAI) code that never arrives is refunded to your PhoneBorn balance.
OTP number or phone-number plan for ChatGPT (OpenAI) in San Marino?
One ChatGPT (OpenAI) code on a San Marino number costs $0.45 and covers a single ChatGPT (OpenAI) check; a plan (from $1.80/month on the 12-month plan) keeps the +378 number and receives ChatGPT (OpenAI) codes as often as ChatGPT (OpenAI) asks. ChatGPT (OpenAI) sends its 6-digit code by SMS: a plan receives SMS and incoming calls, an OTP number the SMS code only.
General ChatGPT (OpenAI) questions — code formats, errors, re-verification — are answered in the ChatGPT (OpenAI) verification guide.
Verify ChatGPT with a +378 number today.
32 San Marino numbers in stock · ChatGPT code $0.45. Pay with USDT or USDC, email sign-up, no ID.