Bill Gates' Daughter -- Hold the Phone ... Is That an Apple Product?!?!

Bill Gates reportedly bans his kids from using iPhones and other Apple products ... but the above device in his daughter's hand -- white headphones included -- looks eerily like a Steve Jobs machine.

Bill's wife Melinda and his 9-year-old daughter Phoebe went out for a light stroll Tuesday in Sydney, Australia -- and we're not 100% sure from the picture ... but it sure looks like Phoebe's holding on to what appears to be an iPhone.

So, we gotta ask ...