Security Rules for Public SMS Inboxes & Temporary Numbers
Privacy trade-offs when using shared disposable phone numbers online.
Every SMS sent to a Quick OTP temporary phone number is visible to anyone who opens that inbox URL. Treat OTP codes as public the moment they appear.
Never use temporary numbers for
- Banking, payments, or cryptocurrency wallets
- Primary email or cloud backup recovery
- Work accounts with confidential data
- Two-factor authentication on important services
Reasonable uses
- Throwaway sign-ups you plan to abandon
- Developer and QA SMS testing
- Trying an app once without sharing your real SIM
When finished, do not link disposable accounts to personal recovery options. Read our full disclaimer and FAQs.
More guides
How to Receive SMS Online with a Temporary Phone Number
Step-by-step: pick a disposable number, use it for verification, and read OTP codes in the public inbox.
Read guide →What Is a Temporary Phone Number?
Disposable numbers, shared inboxes, and what temporary phone numbers mean on Quick OTP.
Read guide →SMS Verification Best Practices with Temporary Numbers
Improve OTP delivery when using free disposable phone numbers online.
Read guide →