Android only installs an update signed by the same key as the version already on your device. This timeline shows every signing key we've seen for 26s: Vocabulary Builder. One known signing key across every release we hold.
1.27.2 → 1.46.3
Current key2 releases · Aug 15, 2026Every key we have ever recorded for 26s: Vocabulary Builder. New builds are compared against this set; a build signed by none of them is what our badge calls a mismatch.
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