sms4sats is a popular service for anonymously receiving SMS verification codes. It operates on a simple pay-per-use model, with payments made exclusively via the Bitcoin Lightning Network (sats). Users can rent a temporary, disposable phone number from various countries to sign up for online services without revealing their real number. The service requires no registration and is highly valued for its speed, privacy, and low cost, making it a go-to tool for bypassing SMS verification while maintaining anonymity.