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 iPhone 4 CDMA "Verizon" TEARDOWN + VIDEO
Unread 08-22-2011, 06:52 PM   #1
ddub420
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iPhone 4 CDMA "Verizon" TEARDOWN + VIDEO

iPhone 4 CDMA "Verizon" TEARDOWN by ifixit.com




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Apple's updated the model number (from A1322 to A1349), but there's not much externally to let us know we're dealing with a Verizon iPhone. Is this the first Verizon phone without "Verizon" emblazoned on it




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There are a few external differences, reflecting the different antenna design of the new CDMA iPhone.

CDMA, or Code-Division Multiple Access, is actually just a channel access method standard. When most people (including us) say CDMA, they usually mean CDMA2000, which is a family of 3G communication standards that run on top of the CDMA mechanism of utilizing airwaves. Confused? Unless you're an RF engineer, the distinction probably doesn't matter to you.
In the US, Sprint and Verizon use CDMA. T-Mobile and AT&T use GSM.
Worldwide, GSM (which stands for Global System for Mobile Communication) is far more popular. But CDMA is still used in 40 countries, primarily in Asia. China Telecom is the next largest CDMA carrier, with over 90 million subscribers.

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The SIM slot is gone. According to Apple, the SIM card and SIM tray were the only user-serviceable parts in the AT&T iPhone 4. Apple now says "iPhone does not contain any user-serviceable parts." We believe you have the right to repair your own hardware, and we'll have a repair guide available right away.
We believe the additional break in the antenna enclosure on the right side of the phone is a result of the switch from GSM to CDMA. An antenna's operating frequency is directly dependent on its size and geometry, so the change-up required an antenna overhaul.
The AT&T GSM iPhone has three differently shaped antennas, which enable the phone to communicate on UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz) and GSM/EDGE (850, 900, 1800, 1900 MHz).
The CDMA iPhone, which has four antenna segments (two "U" shaped pieces at the top and bottom, and two straight bars along the edge) only needs to operate on 800 and 1900 MHz for CDMA EV-DO Rev. A.
Both phones use 2400 MHz frequencies for Bluetooth and 2.4 GHz for WiFi and the 1.575 GHz frequency for A-GPS.

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As expected, the iPhone came with tiny Pentalobe screws.
We've got a couple options for you to get past these screws. We offer a Liberation Kit to replace these screws with standard Phillips screws, or a high-quality Pentalobe screwdriver (pictured).



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After the screws are out, the back cover slides off easily.


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At a quick glance, things don't look too different in here. But the fact remains, they are not identical. If you can't tell, the Verizon iPhone is on the left.
Apple has removed the counterweighted vibrator motor in the corner of the phone and switched to a different vibrator design that's now placed near the battery connector.
You can also see the re-located antenna notch in the second picture.


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The back covers are very similar, but not interchangeable.
Curious which phone you should take with you on your epic around the world journey?
Wikipedia lists just 58 CDMA carriers in about 40 countries, and almost 300 GSM/UTMS carriers.
If you only have room for one phone, stick with the GSM version. But, if you are desperate for more reliable coverage in the US, Verizon will provide you with a free loaner 'country compatible' phone for up to three weeks.



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Once you're inside, the battery is very easy to replace. The battery is listed as the same 5.25 Watt-hour capacity, but does have a new model number (616-0520).
The new battery also weighs less; it shrunk from 26.9 grams to 25.6 grams.



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Disconnecting the Wi-Fi antenna.
For enough room to disconnect the Wi-Fi antenna on this phone, the ground finger must first be removed. Apple moved this finger out from beneath the battery connector, making battery replacement that much easier.
The Wi-Fi antenna and chip are perhaps the only RF components of the phone that did not receive a revamp. The board utilizes a Broadcom BCM4329 - the same chip found on the GSM iPhone 4. This antenna is nearly identical to the unit found in the GSM iPhone 4.
The speaker chamber and Wi-Fi antenna assembly come out easily enough.


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After removing a metal shield, a sea of connectors becomes visible.
Thankfully none of them are tricky to disconnect, so disassembly is not especially challenging. With the help of a repair guide to keep screws and pieces straight, repairing this phone shouldn't be too difficult.

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The logic board can finally be lifted out of the iPhone.



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Verizon iPhone 4 logic board on top.

Although it's the same form factor, this is definitely not the same board. Conspicuously absent is the SIM slot. That's freed up a lot of space for something.
We'll get the EMI shields off soon enough...
Apple used custom molded rubber bumpers between the chips and the EMI shields presumably to quell any interference between analog and digital circuitry.
Quote:
The front side of the Verizon logic board (on top) contains:
RED - Apple A4 Processor
ORANGE - Qualcomm PM8028 Power Management
YELLOW - Dialog D1815A Power Management IC (Apple branded 338S087)
GREEN - 343S0499 - Texas Instruments Touchscreen controller - Apple/TI, part is #343S0499/#F761586G (an up-rev from earlier # F761586C of the iPhone 3GS)
PURPLE - SKY77711-4 - Skyworks poweramplifier module for CDMA/PCS
BLUE - SKY77710-4 - Skyworks power amplifier module for dual-mode CDMA/AMPS

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The back side of the Verizon logic board (on top) contains:
RED - Qualcomm MDM6600
ORANGE - Toshiba TH58NVG7D2FLA89 16 GB NAND Flash
YELLOW - Toshiba Y890A111222KA
GREEN - RS KMOD16104 - The logo on this package appears to be that of Murata's. We suspect that this contains the Broadcom BCM4329 that reportedly provides Wi-Fi/Bluetooth connectivity.

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Here's the brains of the iPhone.

RED - The A4 markings read N31BNPZ5 APL0398 339S0123, front and center.
ORANGE - ST Micro's 2052 33DH 0BGDL (three-axis accelerometer)
YELLOW - ST Micro's AGD8 (L3G4200D 3D gyroscope)
BLUE - 10C0 047A 0315
GREEN - Cirrus Logic 338S0589 CLI1495B0 Audio Codec (Apple branded)

These photos belie how small all these chips are. We'd be lost without the help of a good camera lens and a magnifying loupe.

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RED - The Qualcomm MDM6600 chip supports HSPA+ data rates of up to 14.4 Mbps and CDMA2000® 1xEV-DO Rev. A/Rev. B
This is the same chipset as the Droid Pro world phone. It supports both GSM and CDMA—which means that Apple could have supported GSM!
Why didn't they? It may be that it was easier to design antennas for a CDMA-only phone -- this phone supports two cellular frequency bands, while Apple supports five bands in the GSM version.
Of course, there's no way it could be a real "world phone" without a SIM card slot.


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Holy haberdashery, Batman! The iPhone 4's vibrator received a complete makeover.
Rather than using a rotational electric motor with a counterweight, the Verizon iPhone appears to utilize a linear oscillating vibrator for call/message alerts. Based on the patent information around this technology, we think this may be a Samsung part.
Our tests show that the new vibrator has quieter, softer feel, and makes a better sound when on a table.

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The display assembly appears to be identical to that of the GSM iPhone 4 at first glance.
Upon further investigation, the mounting tabs are in drastically different locations for the two display assemblies. This means the two assemblies are definitely not interchangeable. The Verizon display is on the left in the second photo.
VIDEO TEARDOWN BY iFixit.com
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Unread 09-17-2011, 06:59 AM   #2
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iFixit

These videos are extremely helpful. thanks.
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Unread 09-27-2011, 02:48 AM   #3
mimega
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this is cool
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Unread 10-04-2011, 11:00 AM   #4
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So helpful thankyou
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Unread 04-12-2012, 08:23 PM   #5
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helped exactly what I needed very informative
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Unread 06-14-2012, 06:03 PM   #6
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Thankyou
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Unread 08-31-2012, 06:13 AM   #7
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Cool.....I LIKE the Chick hehehehe.....Thanks for sharing, very helpful...
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