In a fairly un-Apple-like outbust, Schiller has fired criticism at the S4, which will be unveiled at Samsung's Unpacked event in New York on Thursday.
In an interview with Reuters, Schiller pointed out that only 16 per cent of Android users are on the latest Android version.
"And that extends to the news we are hearing this week that the Samsung Galaxy S4 is being rumored to ship with an OS that is nearly a year old," he added. "Customers will have to wait to get an update."
Some would suggest that Schiller's statement is indicative of the pressure that Android has piled on Apple's iPhones.
Schiller's views, ahead of the launch, serve to show just how important a phone the S4 actually is, representing the flagship of the Android market.
And we'd lay a bet that you won't hear Samsung having a pop on the day of the Apple iPhone 6 launch when it arrives.
We'll be at the event in New York with all the latest details, so stick around to see just how impressive the Samsung Galaxy S4 proves to be.
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Patrick Goss is the ex-Editor in Chief of TechRadar. Patrick was a passionate and experienced journalist, and he has been lucky enough to work on some of the finest online properties on the planet, building audiences everywhere and establishing himself at the forefront of digital content. After a long stint as the boss at TechRadar, Patrick has now moved on to a role with Apple, where he is the Managing Editor for the App Store in the UK.