Tried to use this app for the first time, but I couldn't even pass the SecureTAC section for first time log in. Didn't receive any TAC number, despite my telco line works perfectly fine. Couldn't go back or request new TAC, just had to stare that page like staring into the abyss. And I've been doing this process since morning until night. Just nothing. Stuck at the same stage. Tried reinstall. Still the same. Disappointed but not surprise.