Guides
SMS verification, explained
Short, practical answers about getting verification codes on a US number. Still unsure? Check the FAQ.
Non-VoIP US numbers: what they are and why apps ask for one
Why many apps reject VoIP numbers for SMS codes, how to tell the difference, and how to get a real US mobile number for verification.
Read the guideHow to get a US phone number for SMS verification
Step by step: receive a verification code on a real US mobile number from anywhere, paid with crypto, with an automatic refund if no code arrives.
Read the guideTesting SMS verification and 2FA with real US numbers
A practical checklist for developers and QA teams testing SMS sign-up, login and two-factor flows end to end on real US mobile numbers.
Read the guideReceive SMS online: a private number vs free public inboxes
Free receive-SMS websites show every message to everyone. Here's why that's risky for verification codes, and what a private online number does differently.
Read the guide