Greta's more certain no harm will come to the device under Iman's care than she is that she won't break it by accident, so she passes it over with a wordless hum in the same key as 'knock yourself out.' Shifting a little to better watch what Iman does, she asks, "Is your number in there?" It must be, though that doesn't mean Greta would have an easy time finding it. Maybe there's some way to make it simpler.