Changed your mobile number in India? Updating exchange recovery details before the old SIM disappears
Changing a mobile number is routine in India. People move to a new operator for better coverage, give up a second SIM to save money, or receive a new number with a job. The exchange account, however, still sends verification codes to the old number. Weeks later, a withdrawal or password change requires an SMS code that never arrives, and the account becomes hard to access. The fix is simple if done in time and more tedious if done late. This guide explains how to update recovery details on Binance, OKX, Bybit or Bitget while you still control the old number, and what the official recovery route looks like if you no longer do.
Listing every place your old number is used
Before giving up a number, make a list of every exchange account, email account and wallet service that uses it for verification or recovery. Open the security settings of each exchange account and note whether the number is used for login, withdrawals or both. Also check your email provider, because the email account that receives exchange notifications is often protected by the same number. Doing this inventory first avoids discovering a forgotten account months later.
Changing the number while you still control the old SIM
The smoothest path is to change the phone number in each exchange's security settings while both the old and new SIM work. Exchanges usually ask for codes sent to both numbers and sometimes an authenticator code. Some apply a short hold on withdrawals after a change as a protective measure; the help center of each exchange explains its own rules. Take the opportunity to set up an authenticator app or passkey, so future number changes affect your account less.
If the old number is already gone
When you can no longer receive codes on the old number, use the official option for changing or resetting the phone verification, which is usually reached from the login screen or the help center. Expect to verify your identity again, possibly with a selfie, and keep the documents used during your original verification ready. Answer accurately and keep every ticket number. Never share passwords or one-time codes with anyone claiming to be support on WhatsApp, Telegram or social media.
Reducing your dependence on SMS
SMS codes depend on the SIM, which can be lost, ported or blocked. After restoring control, add an authenticator app and write its setup key on paper kept at home. Register a passkey on your phone and a second device if the exchange supports it. Keep SMS as one method among several rather than the only one, and review your security settings whenever you change devices or numbers again.
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Scenario checkpoint
- List every exchange and email account that uses your old number before giving up the SIM
- Change the phone number in each exchange security page while both SIM cards still work
- Use only the official phone reset option from the login screen if the old number is gone
- Add an authenticator app and a passkey so a future number change does not lock you out