Google this week will start inviting 2-Step Verification (2-SV) SMS users to try Google Prompt, its year-old method of approving sign-in requests on smartphones.

Launched in June 2016, Google prompt allows users to approve sign-in requests via 2-SV by simply tapping “Yes” on a prompt. Available for both Android and iOS users, Google prompt received an improvement in February 2017, when Google added real-time security information about the login attempt, such as when and where it was made.