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 UC Browser-Safe, Fast, Private. One known signing key across every release we hold.
15.2.2.1398
Current key1 release · Jul 27, 2026Every key we have ever recorded for UC Browser-Safe, Fast, Private. New builds are compared against this set; a build signed by none of them is what our badge calls a mismatch.