Symantec Mobile Security 7.2 successfully downloads files from LiveUpdate, but cannot apply them successfully. The pop-up on screen indicates "2 updates downloaded, 0 installed." Other Android clients in the same environment (perhaps updating the same files from an internal LiveUpdate Administrator 2.x server) can successfully update.
Upgrade clients to version 220.127.116.11 or perform a fresh install of version 18.104.22.168. This release is currently available from Google Play, and has been confirmed to correct the issue and allow for successful updates from internet LiveUpdate servers or from internal LUA 2.x servers.
The affected Android client is running the hotfix1 release of SMS 7.2 (version 22.214.171.124). Clients running 126.96.36.199 are not affected.