Works only (LGUhiddenmenu) for SKT (South Korea Telecom) variants.. samsung s4 (e300s/l/k and e330s) s5, note2 and note3 (n900s/k/l)

Code: 319712358
password: 996412 (eg. S4 e300s)
: 774632 (eg.S4 e330s)
: 0821 (Note3 e900l)

Base on my personal experience codes are perfectly working to manipulate your baseband signal (LTE, 3g,2g)