Verification and compatibility

Why do Google verifications fail more often than others?

Answer

Google checks registration history as well as line type, so a number previously used to create an account is rejected even though it is a perfectly valid mobile. HushSMS keeps a never-recycled pool for exactly this: numbers never allocated to anyone before, which is why they carry a 1.45× multiplier and why it is the only pool we will refund on for Google specifically.

The longer version

Google's abuse problem is bulk account creation, and reuse history is the cheapest signal. Carriers routinely recycle disconnected numbers within months, so most of the world's mobile stock carries some history. That makes "never allocated" genuinely scarce, not a marketing tier. A never-recycled number stops being one the moment you use it, so the premium is priced against a thing that can only be sold once. As a result, this is the one place in the catalogue where the cheap option for creating a Google account is a false economy.