iPhone 4 Verizon Upper Antenna Replacement - iPhone 4 CDMA

Step 1 | Rear Panel

To start, ensure the iPhone's battery has depleted to less than 25% capacity; a fully charged lithium-ion battery presents a fire and/or explosion hazard if damaged.
To prevent electrical shock or damage to components, ensure the iPhone is completely de-energized prior to starting the repair process.
To detach the back casing, inspect it for either two #000 Phillips head screws or Apple's proprietary 5-Point "Pentalobe" screws; confirm you possess the matching screwdriver for successful removal.
Using either a Pentalobe or Phillips #000 screwdriver, detach the two screws measuring 3.6 mm located adjacent to the dock connector.

Step 2

Apply pressure to the back cover, directing it upwards against the device's uppermost border.
Expect a displacement of approximately 2 millimeters.

Step 3

To detach the rear panel, apply upward pressure with your fingers while gripping the back surface, or secure a Small Suction Cup to the panel and lift.
Exercise caution to prevent harm to the plastic clips affixed to the rear panel.

Step 4 | Battery

If present, detach the battery connector from the logic board by unscrewing the single Phillips screw with a 1.5 mm head.

Step 5

Carefully lift the battery connector away from its corresponding socket on the logic board, utilizing the edge of a plastic opening tool to avoid damage.
Exercise extreme caution during disconnection, applying force solely to the battery connector itself; applying pressure to the logic board socket risks irreparable damage.
Carefully detach the metal clip, which secures the antenna connector.

Step 6

To release the battery from its adhesive backing, grasp the visible, transparent plastic tab and lift upwards.
Should the battery retaining tab fracture prior to separation, introduce a small quantity of isopropyl alcohol with a concentration exceeding 90% beneath the battery's edge. Allow approximately one minute for the alcohol to dissolve the adhesive bond. Then, gently insert a spudger beneath the battery tab to detach the adhesive.
To prevent damage, avoid prying on any areas other than the intended locations; excessive force when removing the battery is not recommended. If the adhesive remains strong, add a small number of additional alcohol droplets to help loosen it. Ensure the pry tool does not puncture or bend the battery's structure.
To prevent damage, ensure any residual alcohol solution is completely removed by wiping with a clean cloth or by permitting it to evaporate fully prior to battery installation.
Disconnect the power source by detaching the battery.
Carefully discard the protective plastic packaging that accompanied the new battery by gently separating it from the ribbon cable.
To prevent wireless interference, thoroughly remove any oils or residue from all metal surfaces that will be in contact during reassembly, using a cleaning agent like Windex.
Following reassembly, execute a full system reset to proactively avoid potential problems and streamline any subsequent diagnostic procedures.

Step 7 | Dock Connector Cable

Using a Phillips screwdriver, detach the dock connector cable from the logic board by unscrewing the two fasteners held in place by 1.8 mm screws.
Carefully detach the flexible metal cover protecting the dock connector cable.

Step 8

Carefully lift the dock cable connector from its corresponding socket on the logic board, utilizing the flat edge of a plastic opening tool.

Step 9

Carefully detach the dock connector cable from both the adhesive holding it to the logic board and the adhesive securing it to the speaker enclosure's side.

Step 10

Using a Phillips screwdriver, detach the pressure contact from the logic board, taking care to unscrew the 1.6 mm fastener located close to the vibrator.
Disconnect the pressure contact.

Step 11

Carefully lift the cellular antenna cable connector from its corresponding socket on the logic board, utilizing the flat edge of a plastic opening tool.
Carefully maneuver the cellular antenna cable, freeing it from the metal finger retainers secured to the logic board.

Ensure the circular connector on the antenna wire's end is precisely aligned with its corresponding receptacle on the motherboard before applying any force during reconnection.

Improper handling risks irreparable damage to the connector’s two sections.

Step 12 | Rear Camera

Using the appropriate screwdriver, detach the five screws.

Use three Phillips screws, each measuring 1.3 mm.
Use a Phillips screwdriver to remove a single screw measuring 1.5 millimeters.
Use a Phillips screwdriver to remove a single screw with a 2.4 mm head.

Step 13

Carefully detach the cable cover by gently prying upwards from the side closest to the iPhone's top edge.
To access the cable, disengage the tabs molded into the electromagnetic interference shield on the logic board, then detach the shield from the iPhone.

Step 14

Carefully leverage the edge of a plastic opening tool to disengage the rear camera connector from its socket on the logic board.
Exercise caution to avoid damaging adjacent parts during the upward separation process.
Carefully detach the rear camera assembly from the iPhone.
To prevent damage, avoid any contact that could create scratches on the display assembly's rear surface once the rear-facing camera has been detached.

Step 15 | Logic Board

Carefully detach the five connectors located at the logic board's upper edge, observing a specific sequence.

The cable connecting the headphone jack and volume controls.
The cable connecting to the power button.
Connect the front camera's ribbon cable.
The flexible circuit board connecting the touchscreen to the device's mainboard.
Connect the display's data cable.

Carefully leverage the connectors of the cables upward from their sockets on the logic board using a plastic opening tool to avoid damage.

Exercise caution to avoid damaging the tiny, sensitive surface mount components while disconnecting the cables.

Step 16

Using a Phillips #000 screwdriver, detach the 1.5 mm screw located close to the headphone jack.

Step 17

Detach the grounding clip from the logic board by raising it.

Step 18

Carefully separate the Wi-Fi antenna cable connector from the logic board using the tip of a plastic opening tool.
Before securing the WiFi ribbon connector to the motherboard, meticulously align the circular end of the ribbon cable, ensuring it's precisely centered over its corresponding connector on the board; any misalignment during attachment risks irreparable damage to both the ribbon connector and the motherboard's connection interface.

Step 19

Carefully peel away any tape obstructing access to the Phillips screw located close to the power button.

Step 20

Using a Phillips #000 screwdriver, detach the logic board by removing the 2.5 mm screw located close to the power button.
Using the appropriate tool, detach the 4.8 mm standoff screw located close to the headphone jack.
To detach standoff screws, utilize a standoff screwdriver or a compatible bit.
If a dedicated tool isn't available, a small flathead screwdriver can be carefully employed; however, exercise heightened awareness to prevent slippage and potential harm to nearby parts.

Step 21

Using a Phillips screwdriver, detach the 3.4 mm screw located close to the vibrator motor.
Using appropriate tools, detach the two screws, each measuring 3.6 mm, positioned on the logic board's edge closest to where the battery is located.

Step 22

Gently raise the logic board, beginning at the speaker enclosure end, and move it horizontally away from the iPhone's top edge.
Carefully detach the logic board from the device enclosure, ensuring no damage occurs.
To prevent grounding problems, thoroughly remove any oils from surfaces where metal components of the logic board touch each other—excluding connector pins—using a cleaning agent like Windex or isopropyl alcohol prior to reassembling.
To avoid display cable damage, a small, rectangular rubber pad located on the logic board's upper edge provides cushioning; ensure proper placement of this pad during logic board reinstallation if it detaches.

Step 23

Carefully retain the tiny grounding tab located close to the power button and adjacent to the rear camera; its loss could affect proper operation.

Step 24 | Upper Antenna

Carefully separate the upper antenna from the headphone jack by gently sliding the edge of a plastic opening tool between the antenna and the jack.

Step 25

Using a Phillips screwdriver, detach the 2.4 mm screw situated adjacent to the headphone jack.

Step 26

Carefully disengage the upper antenna connector from the headphone jack using the tip of a plastic pry tool.

Step 27

Carefully separate the microphone assembly from the outer case casing by gently inserting the edge of a plastic opening tool between the two components.
Carefully separate the headphone jack's housing from the iPhone's upper surface.

Step 28

Using a Phillips screwdriver, detach the upper antenna from the outer case by unscrewing the 2.5 mm screw that holds it in place.

Step 29

Carefully detach the iPhone's top antenna assembly.
To prevent wireless interference, thoroughly remove any oils from the upper antenna's metal contact surface—excluding the connector’s joining pieces—using a cleaning agent like Windex or isopropyl alcohol prior to reassembling the device.