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 Avast One: Antivirus, Security. One known signing key across every release we hold.
26.11.1.260616601
Current key1 release · Jul 27, 2026Every key we have ever recorded for Avast One: Antivirus, Security. New builds are compared against this set; a build signed by none of them is what our badge calls a mismatch.