The Bots and the Bees - S1-E14
Continuity mistake: In the scene where Malcolm and the Krelboynes are talking and watching Robots after the opening credits. There is a blue schoolbag on the table but after it is gone, but when we see the table again the schoolbag is there again.
Answer: Francis is only allowed to talk on the phone at school for three minutes a day. I think the code gives him free access to talk to his girlfriend.