Keep your real number private
Sign up for an app you do not fully trust yet without handing out your personal line. The number is temporary. Your SIM stays yours.
Who it is for
Use cases
Why people keep a second number, and why retailers keep a wallet.
Verify accounts your line cannot reach
Some services block or ignore certain countries. Pick a route that actually receives the OTP.
QA and product testing
Developers and QA teams need a fresh number to test signup, login, and recovery flows without burning staff SIMs.
Retailers and resellers
Agencies and shops pre-fund a retailer wallet, buy at the volume markup, and optionally call our API with a key. You remain responsible for how your customers use each number.
What we do not support
OTPNACK is not a tool for spam, scam, identity fraud, or breaking into someone else’s account. Those uses are reserved against in our Terms and may close your wallet.