Marketing companies routinely sell user data. By routing registrations through a temporary number, your personal phone remains free from robocalls, marketing texts, and phishing links. 2. Privacy and Anonymity

Do not use public numbers for online banking, cryptocurrency exchanges, primary email addresses, or personal social media profiles.

| Solution | Cost | Reliability | Best For | | :--- | :--- | :--- | :--- | | | $0 | Low (20% success) | Spammy forums, disposable tests | | Paid SMS services (e.g., SMSPool, 5SIM) | $0.10–$0.50 | High (95% success) | WhatsApp, Telegram, Google | | Burner apps (e.g., Burner, Hushed) | $1.99+/mo | Medium | Short-term dating apps, Craigslist | | Physical prepaid SIM | $5–$10 | Very High | Banking, permanent accounts |