Basic Hardware Handling Procedures

How to Properly Dismantle Mobile Phones Handsets

Before Proceeding to dismantle any mobile Phone Handset make sure to ask your costumer about the warranty period of the said handset. Attempting to open it, may lose service warranty, just unless you are working in any authorized service center which is you are the one who decides.
Dismantling mobile handset needs extra care to avoid further damaged.
Scratches and breakage also takes place if unhanding carefully. On the internet you can easily find disassembly guide just type the following keywords example 
"brand + model number + Disassembly guides" you may also find it in Youtube for video guides.
Even Professionals needs extra care how to dismantle mobile handset. Various brands have deffirent types of packaging types. Opening Tools also varies according what they suggest including torx screw number and other opening kits. 
keep your time and don't rush in, always keep in mind that you are handling fragile object. 
Wearing white cotton  hand gloves is a good advice for begineers and even Pros, to avoid risk of Electro Static Discharge 
(ESD) There are components like CPU and Memory Chips which is can be easily damaged by Human Interference, a ground strap is also required as advice.
Make your working table free of dust and dirt's and other objects which is not part of disassembling tools, to keep a place where all part have to put when opening operation is done. 
Here's an example dis-assembling of Nokia handset looks like.

Latest released of mobile Phone products doesn't have guides available like shown above. Pros and masters defends only their instincts to tear it down, with out any guides available. 

Here is set example of a teardown with iphone 3G courtesy of iFixit

iphone 3G
Tools Used in this Guide

*Dental Pick
*Metal Spudger
*Paper Clip
*Phillips #00 Screwdriver
*Spudger

Step 1 — Battery

*Remove the two Phillips #00 screws from the dock-connector end of the iPhone.


Step 2

*There is a rubber gasket between the silver front bezel and black display assembly. A bit of force is required in this step to separate the iPhone's display assembly.
*Use a small suction cup near the Home button to gently pull up the bottom portion of the iPhone's display assembly.


Step 3

*The display assembly is still connected to the iPhone by several cables, so don't try to remove it entirely just yet.
*Rotate the display assembly up until it is at an angle of approximately 45 degrees.

Step 4

*Continue to hold the display assembly with one hand, and use your other hand and a spudger to disconnect the black ribbon cable labeled "1."

Step 5

*Rotate the display assembly up until it is roughly vertical. This will allow easier access for disconnecting the remaining cables.
*Use a spudger to disconnect the black ribbon cable labeled "2."


Step 6

*Use a spudger to flip up the white plastic tab holding the remaining ribbon cable in place. The white tab will rotate up 90 degrees, releasing the ribbon cable.
* Slide the black ribbon cable out of its connector, and remove the display assembly from the iPhone.



Step 7

*Insert your SIM eject tool or a paper clip into the hole next to the headphone jack.
*Press down on the tool until the SIM card tray pops out.
*Grasp the SIM card tray and slide it out of the iPhone.


Step 8

*Use a spudger to disconnect the ribbon cable labeled "4."


Step 9

*Use a spudger to disconnect the ribbon cable labeled "5."


Step 10

*Use a spudger to disconnect the ribbon cable labeled "6."


Step 11

*Carefully peel up the small sticker labeled "Do not remove."


Step 12

*Remove the following 8 screws:
oFive 2.3 mm Phillips #00 screws with partial threads securing the logic board to the rear panel.
oTwo 2.3 mm Phillips #00 screws with full threads securing the logic board and camera.
oOne 2.9 mm Phillips #00 screw from beneath the "Do not remove" sticker.

Step 13

*Use a spudger to gently pry the camera up and out of its housing in the rear panel. The camera cannot be removed entirely yet because it's connected to the bottom of the logic board.


Step 14

*Use a spudger to gently pry up the end of the logic board closest to the dock connector.
*If the board won't lift up, double check to make sure all the screws securing the logic board have been removed.


Step 15

*Slide the logic board towards the dock connector and out of the iPhone.

Step 16

*Use a spudger to pry the battery up from the rear panel. The battery is attached with an adhesive strip around the perimeter of the battery. To prevent the battery from bending during the removal process, we recommend against using just the plastic pull-tab .


Step 17 — Headphone Jack 

*Remove the two Phillips #00 screws securing the on/off switch to the front bezel.


Step 18

*Carefully peel up the orange ribbon cable from the rear panel.


Step 19

*Remove the following 4 screws:
oThree 1.8 mm Phillips #00 screws securing the headphone jack and GPS antenna to the rear panel.
oOne 3.8 mm Phillips #00 screw in the plastic loop near the headphone jack.


Step 20

*Remove the four Phillips #00 screws securing the volume and vibrate buttons.


Step 21

*Lift the volume button circuitry away from the side of the iPhone, and carefully peel up the orange ribbon cable from the rear panel


Step 22

*Carefully lift the headphone jack assembly out of the iPhone.



Step 23 — GPS Antenna 

*Remove the single Phillips #00 screw securing the black plastic spacer.


Step 24

*Use a spudger to pry up the black plastic antenna housing from the rear panel.
*Lift the black plastic antenna housing out of the iPhone.

Step 25 — Rear Panel 

*Remove the on/off switch button from the iPhone.



Step 26

*Remove the vibrate button from the iPhone.


Step 27

*Remove the two Phillips #00 screws securing the vibrator to the rear panel.
*Lift the vibrator up and out of the iPhone.


Step 28

*Remove the following 3 screws:
oTwo 1.5 mm Phillips #00 screws, one on either side of the dock connector.
o One 2.4 mm Phillips #00 screw near the ribbon cable labeled "4."


Step 29

*Lift the dock connector assembly up and out of the iPhone.


Step 30

*The rear panel and attached front bezel remain.

iPhone 3GS Teardown 

Step 1

*The original iPhone was very difficult to open, but we expect the 3GS (like the 3G) to be quite serviceable. There are still two visible screws on the bottom of the phone, which is a good sign for easy opening.
*Remove the two bottom screws with a Phillips #00 screwdriver.

Step 2

*A small suction cup is your friend. A large suction cup may also be a fun toy.
*There are seven numbered connectors on the 3GS, up from six on the 3G. Connector number seven is in the lower right corner, just above the dock connector.

Step 3

*There are three cables holding the LCD and digitizer to the rest of the logic board. Disconnecting them is as easy as 1-2-3.

1: LCD panel


2: Digitizer


3: Ear speaker

Step 4

*Here's the two halves.
*All the chips on the logic board are hidden beneath two large EMI shields. We'll have those removed in just a bit.


Step 5

*Just like the iPhone 3G, the LCD is pretty easy to replace. After removing 7 screws, the LCD simply lifts out.
*On the iPhone 3G, we see a lot more cracked digitizers than cracked LCDs. Replacing the digitizer is a little more work, and requires breaking out a heat gun or hair dryer.





Step 6

*Here's the fabled "Do not remove" sticker. It didn't stop us last year, and it's certainly not going to stop us this year.


Step 7

*Removing the logic board. Like the 3G, there is a single large PCB with all components.


Step 8

*The main logic board. There's a lot packed in here. Here's a high-res image of this shot.
*The Apple-logo chip is the primary Samsung ARM processor.
*The 16 GB of Toshiba flash are now on the front of the board, just below the Samsung ARM.


Step 9

*The other side of the logic board. You can see the battery contact pads in the lower right corner. Apple was again kind enough to not solder the battery to the logic board.
*Here's a high-res image of this shot. 

Step 10

*Apple promises improved battery life with the 3GS. The battery is listed as 3.7V and 4.51 Whr. This comes out to 1219 mAh, compared to 1150 mAh on the 3G. That's only a 6% increase.





Step 11

*Video recording is a long-overdue feature of the iPhone 3GS. The 3GS records video at 640x480 resolution and 30 fps.
*The video recording quality appears acceptable, although not exceptional. You can see a video (taken using another iPhone 3GS) of us opening the phone.


Step 12

*The 3GS offers Voice Control. We're not sure yet why this feature couldn't be added via software to earlier iPhones. Perhaps the voice recognition requires a better microphone than in earlier iPhones or a lot of processing power, or maybe Apple just wanted to differentiate the 3GS.


*According to Richard Lai, the "Chinese (Cantonese) voice control works, but took a while to work out the magic words as there is no guide released yet (not out in Hong Kong until early July)." He also tested the "Chinese (Mandarin) and Chinese (Taiwanese), although the latter didn't work as well since [he doesn't] do the accent well."


Step 13

*Here's all the parts. We'll continue to perform further analysis.