Iron Imperative
Gyroscope and accelerometer alter the molecular organization of physical exterior. When a phone is dropped, its sides and corners reinforce themselves dynamically midair.
Antennas of Apis sense distance and geometry of the landing surface and control the landing speed and body movement of the insect.

Problem Statement
Unlike feature phones, a smart phone is a wild beast. For it tames itself according to the needs of its user. But this difference between two types of phones is a difference in their operating systems only. Assembly methods and the physical nature of hardware of both types of phones is still the same. Therefore, a smart phone is not fully smart. A smart phone should be able to avoid fracture when it is dropped on a floor. Currently, we rely on external protectors bought separately.
There are two ways to increase damage-resistance of a phone. 1. Use of high quality materials (for instance, iPhone X claims to have world’s strongest glass front). This increases the overall cost significantly 2. Components are made of cheap material but the phone is assembled in a way shatters into its components at the impact- and can be reassembled (Nokia has followed this design principle for the longest time). In terms of smartness of a phone, both of these principles are equally primitive.
A new kind of phone needs to be envisioned which is smart both in terms of its body and brains. For one thing, if it is dropped on a floor, its body should sense the fall and respond in time to avoid damage.
Nature Review
There are many case studies in Nature which guide us in this problem. The body movement of a falling cat has probably been analyzed most. And a lesser known strategy of pea aphid has already been mimicked in another gadget. However, all such examples require somewhat mechanical adjustment which could attract a host of extra challenges in the design. A highly perceptive and subtle process of the landing of a honey bee is emulated in this case.
A honey bee can land itself smoothly at any speed and at any angle, thanks to its antennas which can sense both degrees and distance. When a honey bee approaches touchdown (at just about 16 millimeters away from the surface) its antennas begin to sense the orientation and texture of the landing surface and causes the body to decelerate itself. And almost effortlessly, its legs, ones closest to the surface, stretch out to ensure a perfectly smooth landing.
Technology Review
After researching up on related design and material technologies, it turns out that a number of strategies need tethering. Gyroscope and Accelerometer sensors need to be connected to the exterior body of the phone. So that it (phone) can sense a drop and detect continuously the micro-coordinates of a surface it is going to hit. Internal components of the phone should be enwrapped in a layer of smart material with nano-scale reorganizational capability. This layer should receive input from the OS sensors. Continuous calculations should result in continuous change of molecular density of the layer. The cited resources are presented below in the form of a technology montage.

Row1Column1: Closeup of Honey Bee
Row1Column2: Honey Bee Balancing Itself Near Flower
Row1Column3: The Moment Before Touchdown
Row1Column4: Honey Bee Spatial Memory and Navigation
Row2Column1: Honey Bee: Distance Estimation in Third Dimension
Row2Column2: Accelerometer and Gyroscope Sensors
Row2Column3: Smart Glass and Its Potential in Energy Savings
Row2Column4: Human Activity and Accelerometer and Gyroscope Data
Row3Column1: Five Smartphone Cases to Survive (Almost) Any Drop
Row3Column2: Coyote Case Protection Mechanism
Row3Column3: Strappy Storage Phone Case
Row3Column4: An Example of Shockproof Cases
Row4Column1: An Example of Multipurpose iPhone Cases
Row4Column2: Prototype of the First Transparent Smartphone
Row4Column3: A Breakthrough in Glass Technology
Row4Column4: The Future of Clear Mobile Phones

Nature Gadget
The nature gadget is a smart layer (18)which enwraps a cell phone. The layer is coded to receive information from accelerometer (24) and gyroscope (21) of the phone. Upon detecting a fall (9, 14) the layer can change its molecular density (6) at the points of projected impact (1-4). Such dynamic reinforcement is made possible with the help of particles which can change their bond structures- changing in turn, the physical state of the layer.

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