Bybit lets you register with an email or a phone, and either way an SMS-confirmed number quickly becomes useful: it's one of the accepted second factors for logins, withdrawals and API-key changes. A virtual number from Get-SMS receives those codes so your personal number stays away from crypto-exchange databases — a reasonable precaution given how often exchange contact lists end up in phishing datasets.
Verification is instant: request the code, read it in your dashboard, done. Bybit accepts numbers from essentially all our country pools; if one is rejected as already registered, cancel it free of charge and take the next.
The right pattern for an exchange account is to use the virtual number for signup, then immediately move day-to-day security to Google Authenticator: Bybit requires 2FA for withdrawals anyway, and an authenticator doesn't depend on any phone number. Do this while the activation window is still open, because switching security settings itself asks for an SMS code. If you prefer keeping SMS as a factor long-term, rent a number for 30 days instead of a one-time activation. Two things the number does not influence: trading access (that's determined by your region/IP and Bybit's own rules) and KYC level — identity verification is a separate document-based process.
The same signup pattern works across other exchanges in our list — the number receives the code, the authenticator takes over security, and your personal SIM never enters the picture. Traders running sub-accounts should still remember the universal rule: one number, one registration.