'This phone number cannot be used for verification'
That message means the app refused the number before sending anything. It checked the number type or its history and said no.
Why does the app say the number cannot be used for verification?
The app looked up the number and found it is in a range it does not trust: usually VoIP, a range used too often for sign-ups, or a country it limits. It never sent an SMS, so nothing is charged. Take a number from the physical-SIM pool, or from a different country, and try once.
What triggers the message
- VoIP or virtual ranges: Google, WhatsApp, PayPal, Uber and banks run a carrier lookup and refuse non-mobile lines.
- Over-used ranges: a prefix that produced many accounts gets rate-limited for everyone.
- Country limits: some apps only accept numbers from certain countries, or from the country matching your IP.
- Account history: a number that already had an account on that app can be refused for a cooling period.
What to do
- Use the physical-SIM pool for strict apps; the app pages list which ones need it.
- Match the country with your IP when the app checks location (most do for payments).
- Do not retry the same number; cancel and take another.
- If every country fails, the limit is on your device or IP, not the number.
SMS Nitro at a glance
| Billing | Pay only if the code arrives. If no SMS arrives before the number expires, the frozen amount returns to your balance automatically, in full. |
|---|---|
| Number reserved for | Up to 20 minutes per activation. Rentals from 24 hours to 30 days with unlimited incoming SMS. |
| Payment | Card via Stripe (Visa, Mastercard, Amex, Apple Pay, Google Pay) or crypto (USDC or SOL on Solana). Minimum top-up $5. Card top-ups carry a 10% processing fee; crypto has none. |
| Subscription | None. Pay per verification; your balance never expires. |
| Countries | 180+ countries, including the United States, the United Kingdom, Canada, India, Germany, Brazil, Indonesia and the Philippines. |
| Apps | 700+ apps and websites: WhatsApp, Telegram, Google, Instagram, TikTok, Discord, OpenAI, PayPal, Tinder, Amazon and more. |
| Developers | REST API plus an SMS-Activate-compatible endpoint. API key available after your first top-up. No API surcharge. |
| Support | Tickets from the dashboard and email, answered by people. |
| Price | From $0.02 per verification code, depending on the app and the country. |
Frequently asked questions
Was I charged?
No. Nothing was sent, so nothing is charged.
Which countries pass Google?
Physical-SIM pools in the US, UK, Germany, Indonesia and the Philippines have the best recent rates; the Google page shows the live ranking.