If you say something can't be in two places at once, you're wrong. Quantum mechanics has proven the superposition principle to be true
Quantum Mechanics doesn't say something can be in two places at once. It predicts probabilities to detect a particle in various locations, but it doesn't say it is actually in all those locations at once.
If you lose your phone you might come up with probabilities it's in various rooms in your house, but that doesn't mean it is "in all those rooms at once" just because you assign probabilities to all the rooms.