Testing and running Cameroonian sign-up flows with +237 numbers

What makes Cameroon its own case for SMS verification?

Cameroon is officially bilingual. French and English both have official status, most regions are French-speaking, and the North-West and South-West regions are English-speaking. For a product team that single fact shapes a lot of QA work: one country, two interface languages, and users who may switch between them.

Teams usually reach for a Cameroon verification number for a few practical reasons:

• A Central African launch, where Cameroon is often one of the first markets on the list and needs its own end-to-end sign-up test.
• Francophone and anglophone localization QA, checking that onboarding screens, error messages and the OTP entry field read correctly in both languages.
• Diaspora customers who sign up abroad but keep a +237 number as their primary contact.
• Regional operations, where a staff member needs to verify a business account without exposing a personal phone.

In every one of those cases the goal is the same: prove that your own verification flow accepts a real Cameroonian number and that the code reaches the person or system waiting for it.

How are +237 numbers written, stored and normalized?

Cameroon has no trunk prefix, so there is no leading zero to strip. National numbers are nine digits long, and mobile numbers begin with 6. In E.164 form that becomes +237 followed by the nine national digits, with no spaces or punctuation.

A few habits keep your data clean:

• Store the E.164 string as the canonical value and format it for display only at render time.
• Strip spaces, dots and dashes on input, since people commonly group the digits in pairs or threes.
• Older CRM records may still hold eight-digit numbers from before the country moved to nine digits. Flag those for review rather than guessing a missing digit.
• Make sure your country picker maps CM to +237 and does not silently fall back to a neighboring code.

If your validation library rejects a correctly formatted +237 number, that is a bug worth catching before launch, and a real test number is the quickest way to find it.

Which language will a Cameroonian verification SMS arrive in?

That depends on the sending service and on the language the account or device is set to, not on the number. Global apps typically send the message in French or English for Cameroonian users, and some fall back to English regardless.

The code itself is digits in nearly every case, so your parser should extract the numeric code rather than match on surrounding wording. When you test localization, run the same sign-up twice, once with the interface in French and once in English, and confirm that your own app shows the right copy around the code field each time.

Which services can deliver codes over a Cameroon route?

The OTP Gateway currently lists more than 2,000 services for Cameroon. Popular ones in the live snapshot include WhatsApp, Facebook, imo, Telegram, TikTok, Google (Gmail & YouTube), Microsoft & Outlook, ChatGPT (OpenAI), Signal, Viber, LinkedIn, Uber and Amazon.

Inventory moves during the day, so treat that list as a starting point. The API returns live availability and the current price for each service and country pair, which is why scripts should ask for it on every run instead of caching it.

How do I call the Cameroon OTP API from a test suite?

All requests go to https://otproute.com/api/v1 with a Bearer key prefixed or_live_. You can create up to 10 keys in the Developer console, which makes it easy to give staging, CI and production tooling separate credentials. Cameroon's country id is cm.

1. Read GET /api/v1/services and GET /api/v1/countries to resolve ids.
2. Request GET /api/v1/prices?country=cm&service=<id> to see the live price and whether the route is available right now.
3. Create the order with POST /api/v1/activations, sending a body like {"service": "whatsapp", "country": "cm"}. The response holds an activation id and a +237 number.
4. Type that number into your own app's sign-up or login screen.
5. Receive the code through a webhook, or poll GET /api/v1/activations/{id} every few seconds. If a test aborts, call POST /api/v1/activations/{id}/cancel.

For webhooks, subscribe to activation.sms_received, activation.expired and activation.cancelled, and verify the X-OTPRoute-Signature header: compute HMAC-SHA256 of <t>.<raw body> with the endpoint secret, compare it with v1, and reject stale timestamps. The webhook signing guide walks through it, and the full reference lives in the API docs. Need to wire this up without spending wallet funds? Ask for sandbox mode on a development account; it returns simulated numbers and codes.

Can a non-developer collect a +237 code from the dashboard?

Yes. Sign in, open the OTP Gateway, pick Cameroon and the service, check the displayed price and order the number. Paste it into the app you are verifying, then wait on the activation page until the code appears.

The activation stays open for 20 minutes. If no SMS arrives before it closes, or you cancel first, the full amount returns to your wallet automatically. When a code does not show up, try these steps in order:

• Let the window run; some services send late.
• Order again later or try a different service route, rather than re-ordering in a tight loop.
• Check whether the service accepts virtual numbers at all, since some refuse them, which is exactly why the refund exists.

The QA testing guide covers how teams fold this into release checklists.

Can I keep a Cameroon number long term, and how is billing handled?

There is no self-serve long-term Cameroonian number on OTP Route. If your team needs one, email [email protected] to ask; whether it is possible depends on local rules and is not something we can promise. Dedicated lines you keep while they renew are a US and Canada product, from $1.95/month, described on the virtual numbers page.

For Cameroonian activations, as for every other route, charges come out of a single prepaid USD wallet, with neither a monthly fee nor a plan. Funding happens by card or USDT/USDC stablecoins, and a PDF invoice for each top-up lands in your inbox. You can create an account with an email code or Google sign-in and switch on TOTP two-factor afterwards. Use the numbers only for your own legitimate products and accounts: follow each service's terms, and remember the OTP Route Acceptable Use Policy applies.

Frequently asked questions

Can I test my app's Cameroon sign-up flow without a local SIM?

Yes. Order a +237 number from the OTP Gateway, enter it in your app, and read the code in the dashboard or through the API with country id cm.

Do Cameroonian numbers need a leading zero when stored?

No. Cameroon has no trunk prefix, so the E.164 form is simply +237 followed by the nine-digit national number.

What does a +237 number for testing cost?

The OTP Gateway starts at $0.20 per code. The exact amount depends on the service and is shown in the dashboard or returned by GET /api/v1/prices before you order.

Will the verification text be in French or English?

It depends on the sending service and the account's language setting. The code is usually numeric, so parse the digits rather than the words.

What happens if my Cameroon activation expires without a code?

Nothing is charged. When the 20-minute window closes without an SMS, the full amount goes back to your wallet and an activation.expired event fires if you use webhooks.

Is there a sandbox for building the integration?

Yes, on request. A development account can be switched to sandbox mode, which returns simulated numbers and codes so you can test end to end without spending funds.

Service names are trademarks of their respective owners. OTP Route is not affiliated with them. Use numbers lawfully, follow each service's terms and our Acceptable Use Policy.