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Samsung Galaxy S4 Teardown Differentiates US And Korean Smartphones

 
John Gaudiosi
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John Gaudiosi is co-founder of GameHub Content Network and Editor-In-Chief of GamerHub.tv. He's covered the video game industry for 20 years for outlets like Reuters, The Hollywood Reporter, Forbes, CNN, Entertainment Weekly, Geek Magazine, NVISION and Tegrazone. 

 Published May 9, 2013 3:19 PM

IHS iSuppli breaks down the hot new gadget.

Processor permutations

One of the biggest differences between the two versions of the Galaxy S4 is the apps processor. The U.S. version offered by AT&T employs the Qualcomm Inc. Snapdragon 600 quad-core processor, costing $20.00. The Korean variation—as well as some other international versions—integrates Samsung’s own Octacore Exynos 5 processor, an eight-core device that costs $8.00 more at $28.00.

The Octacore Exynos 5 enables some unique, processor-intensive applications that are not possible with the Snapdragon processor. These include eye-movement recognition, which allows a user to pause a video simply by looking away from the S4 display.

The Octacore Exynos 5 also features the big.LITTLE architecture developed by ARM Holdings, which consists of four 1.6-gigahertz (GHz) Cortex-A15 “big” cores and four 1.2GHz Cortex-A7 “LITTLE” cores. The big cores—which deliver higher-performance capabilities and use more power—handle higher-priority tasks or those demanding computational intensity. The LITTLE cores, not as powerful and using less energy, are delegated to lower-priority or less demanding tasks.

Such a configuration allows the big.LITTLE architecture to achieve a balance of performance and power efficiency, making the Korean phone fast and allowing it a long battery life.

Less is more for wireless

The wireless subsystem of the U.S version of the Galaxy S4 costs $1.50 more than the Korean version. The part selection in this subsystem also varies, with the U.S. version using the MDM9215M and WTR1605L devices from Qualcomm. Meanwhile, the Korean version contains Samsung’s baseband and radio frequency transceiver and front end.

Interface the nations

More noteworthy differences can be found in the respective user interface and sensor subsystems of the Korean and U.S. versions.

The Korean S4 features a Silicon Motion Mobile TV system-on-chip device, whereas the U.S. S4 features a separate Fujitsu image processor to offload the core processor when using the camera processing.

Samsung’s Octa-core Exynos 5 likely handles the image processing itself in the Korean version, eliminating the need found in the U.S. version for a separate Fujitsu image processor within the Qualcomm solution. Interestingly, even though the Korean version has added the Mobile TV feature, its user interface and sensor subsystem still costs $2.00 less than the U.S. model with the added Fujitsu image processor.

On the radio

Still more distinctions can be found in the subsystems containing the wireless local area network (WLAN), Bluetooth (BT), FM radio and global positioning system (GPS).

The Korean and U.S. versions use the Broadcom BCM4335 chip. However, the Korean model requires a discrete BCM47521 from Broadcom to support GPS functionality. The extra Broadcom chip is not in the U.S. carrier version, as the Qualcomm Snapdragon provides onboard GPS functionality.

Because of this, the U.S. version’s WLAN/BT/FM/GPS section costs $2.00 less than the Korean version.

Samsung’s S4 supremacy

One thing that all versions of the Galaxy S4 share is their extensive use of Samsung-made componentry.

“No other company in the world has an internal supply chain like Samsung’s,” Leung said. “ “The display, memory, apps processor, baseband, RF transceiver, cameras, power amplifier and a range of other parts—all these make Samsung unique in its capability to supply key parts and capture so much value in a mobile device.”

Table 2 and Table 3 attached illustrate Samsung’s dominance of the components and subsystems in the Galaxy S4.

Virtual reality

An IHS virtual teardown of the 16GByte of the U.S. version of the Galaxy S4 smartphone initially estimated its BOM at $233.00, rising to $241.00 when the manufacturing cost is added. The physical teardown mostly confirmed the pricing and design predictions made in the virtual teardown, with some minor exceptions.

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