''Can i borrow your phone?''
if a film rests on a character inexplicably withholding information from another character—even though it's in his best interest to divulge said information and there is literally no danger associated with divulging the information—and yet he chooses instead to inexplicably withhold the information, then the film is badly written.
If a film does it twice, it is irredeemably badly written.
This film literally relies on the fact that, rather than explaining the situation to his father, the son chooses to sit sullenly while his father spends three days calling him a pedophile and a terrorist.
He is neither a pedophile nor a terrorist. But he doesn't tell his dad this. Instead we have to wait…