When it comes to smartphones, people are usually looking for something light and portable, although Apple's new iPhone 6S is actually putting on the bulk.

In fact, the recently revealed smartphones from Apple are actually the heaviest ones that the company has ever made, according to Tech Insider.

The new model's weight gain is not insignificant either, as it is said to weight about 11 percent heavier than its predecessors from last year.

There has to be a reason for the sudden weight gain.

Upon discovery of the additional heft, people were quick to point to the phone's new metal body as the culprit behind its sudden gain of bulk.

Apple says this isn't the case, however. According to the company, the new aerospace-grade aluminum alloy that has been used in the composition of the iPhone 6S does indeed adds weight, but only a little of it.

Apple has said that the 7000-series aluminum they have used to make the new models adds about two grams to the whole thing.

It's a necessary two grams as well, since Apple has suggested that the new metal makeup of the phone has been designed to prevent the unit from being deformed or bending, a problem much publicized during the "BendGate" firestorm.

There happens to be a different explanation for the weight gain of the new Apple smartphones, and it happens to be the much bandied about 3D Touch displays, according to The Verge.

As opposed to the 7000-series aluminum body that adds all of two grams to the phone's overall weight, the new display adds a whopping 17 grams to the phones. For reference, the displays of the iPhones from last year topped out at 12 grams, meaning it is now more than twice as heavy as before.

It's a necessary addition as well, as it is the one responsible for allowing the new iPhone models to properly measure pressure that would be used for the Force Touch feature.

It's a significant weight gain, but one with a cause for the iPhone 6S.