Most crypto exchanges require phone verification during signup and again for certain security prompts, tying the account to whatever number you enter. That's a real problem if you're testing a signup flow repeatedly, managing more than one account, or just don't want an exchange holding your personal number.
Steps
Rent a number for the exchange you're signing up with — an instant rental covers a one-time signup verification.
On the exchange's signup or phone-verification screen, enter the rented number with its country code.
It sends a verification code by SMS, usually within a few seconds.
Enter the code from your rental's status page to continue.
Instant or monthly?
A one-time signup only needs an instant rental. If you expect the exchange to text that number again later — a new-device login prompt or a security check — a monthly rental keeps the number reachable for the full period instead of releasing it right after the first code.
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