Lost my phone and can't receive verification code

That's bad, did you set-up two step verification with your phone number? If yes, what country?

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@Aqib  wrote:
I can't access my account because i loss my old mobile. two step verification code not received on email

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Did you enable Two-step verification on your account? If so, you would have received emergency backup codes that you can use to get back into the account.

If, however, you didn't enable two-step verification and Dropbox is just sending a security code to your email address instead, then you'll need access to that email address in order to receive the code.

Let us know which issue you're having and we'll take it from there.