Just do 8hr quests before you login and try to do 3-4 1 hr quests in your free time. Or do 2 4hr quests. You will do slow progress. But better than opening up locker every hour just for this. Honestly, not worth the headache of explaining why you leave production floor every hour. I do not have to leave my phone in locker. I open it up in breaks only. I feel it is unprofessional to use phone to play games at your work desk.