How to Sell Test Phone Numbers to App Developers and QA Teams

Every app with phone sign up has to be tested with real numbers. Mock numbers catch bugs in the code but not the real problems. Slow delivery in one country, blocked number types, broken auto fill. Development teams need real numbers in many countries, on demand, and they need them every release. That makes them great customers.

Why developers are good customers

• They buy regularly, every sprint and every release.
• They care about reliability more than the lowest price.
• They pay with company money and dislike switching suppliers once something works.

What they need from you

1. Many countries. Their users are global, so their tests are too.
2. An API. Test scripts request a number, wait for the code and cancel if nothing comes. Manual clicking doesn't fit automated testing.
3. Refunds for failed numbers. Test runs fail sometimes. They shouldn't pay for numbers that never received anything.
4. Clear invoices and receipts. Their finance team will ask.

How to reach them

• QA and testing communities on Telegram, Discord and Reddit.
• Write a short guide on testing SMS sign up flows and share it where developers read.
• Contact small app studios and agencies directly. They rarely have a good solution for this.

Pricing for teams

Teams buy in volume. Top up bonuses for larger deposits work well because a company prefers to prepay once a month rather than top up every day. Keep prices predictable. A team that budgets per release hates prices that jump.

Speak their language

Skip the marketing words. Developers want to know the countries you cover, how fast codes arrive, how the API works and what happens when a number fails. Put that on one clear page.

Setting it up

A telly.cat reseller store gives you the storefront. Your customers can use your store while telly.cat fills the numbers and handles refunds for failed ones. For the technical side, telly.cat's API documentation shows how automated number requests work.

FAQ

Why do developers need real test numbers?

Mock numbers can't show real delivery times, blocked number types or autofill problems in different countries.

What do developers value most in a number supplier?

Many countries, reliable codes, refunds for failed numbers and clear receipts.