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 Nusuk | نسك. One known signing key across every release we hold.
17.4.9
Current key1 release · Jul 29, 2026Every key we have ever recorded for Nusuk | نسك. New builds are compared against this set; a build signed by none of them is what our badge calls a mismatch.
Shenzhen United Power Technology Co., Ltd. · Health & Fitness