What issues this repair will address

• Cellular reception issues - if your iPhone 4 can't hold a cellular signal, won't connect to 3G, or constantly says "Searching.." - you may need to replace your antenna. First try replacing your SIM or speaking with your carrier.
• Bottom speaker doesn't work when using speakerphone or playing music

What you need for a DIY speaker or cellular antenna repair

• GSM iPhone 4 (please note there ARE internal differences between the GSM and CDMA models)
• New GSM iPhone 4 speaker assembly or cellular antenna (whichever part you are replacing) - iPhone 4 speaker assembly, GSM iPhone 4 cellular antenna
• SIM removal tool (or a paper clip)
• #00 Phillips screwdriver
• Pry tool or spudger
• Security screwdriver (only if your iPhone has 5-point security screws in the dock connector)

Power off your iPhone 4

Remove the back

1. First remove the bottom 2 dock connector screws in your iPhone 4. Use either your #00 screwdriver or the five point depending on whether or not your iPhone 4 has security screws in the dock connector. Almost all newer devices will have security screws.

2. To remove the back simply slide the back upwards and lift it off gently.
3. Set the back and 2 dock connector screws aside.

Remove your SIM card

Remove the battery

1. To remove the battery you’ll need to remove the #00 screw holding the battery clip in place. Remove this screw located to the bottom left of the battery.

2. The metal clip on the battery is what clips the battery to the logic board. You’ll need to pop this clip up with your plastic pry tool. Simply stick the end of your pry tool underneath the clip and gently pull upwards until it unfastens from the logic board.

3. To remove the battery, I do not recommend using the plastic pull tab. There is quite a bit of adhesive underneath the battery and the tab will normally just rip off or you can bend the battery. Instead, run your pry tool along the right side of the battery and break the adhesive that way. Once the battery is free from the adhesive, you can pull the battery out of the phone. There are no other connectors holding it in.

4. You will notice a tiny grounding clip sitting underneath where you unscrewed the battery. Set this aside for replacement during reassembly. This is a grounding clip for your antenna. Make sure you put it back in place before reconnecting your battery.

Remove the dock connector shield and disconnect the cable

1. There is a shield held on with two screws covering the dock connector cable. Remove the two screws holding it in place and set the shield and screws aside, remembering where they came from.

2. Next, use your pry tool to pry up the actual dock connector cable. Be careful as there is adhesive holding the cable in place as well. Peel back the adhesive gently to free the cable.

Remove the top logic board shield

1. There are 5 screws holding the logic board shield in place. Remove the 5 screws holding it in place. Just be sure to remember which holes they came out of as the screws are different sizes. I always keep them in order of how they came out.

2. Next you'll need to remove the shield. There is a tiny clip built into the shield holding it in place. (Refer to the photo above.) Pop it up with your pry tool and you should be able to slide the shield up fairly easily. Just take care not to bend it or break off a clip.

Disconnect the 6 cables from the top of the logic board

1. There is only one connector holding the camera to the logic board. Remove this cable in the picture above using your pry tool. Gently lift upwards and it will pop right off.

2. Next gently lift the camera out of the device. You'll notice there is a tiny tab that is seated underneath the LCD and digitizer cables to the right.

3. Next pop up the LCD and digitizer cables to the right of where the camera cable was connected. You pop them up in the same direction.

4. The 3 cables further to the right will need to be disconnected as well. They pop up in the opposite direction.

Remove the logic board

1. Start with the 2 screws holding the logic board down in the middle and at the bottom left. Both use your #00 Phillips screwdriver. They are the same size. The one on the right of the logic board in the middle of the device has a water sensor over it you'll need to remove.
2. The second screw is located where the logic board meets the speaker assembly towards the bottom left of the device.

3. The third and final screw holding the logic board in is located at the top of the logic board off to the right. It is the only cross-head screw in your device. Use a small flathead screwdriver to carefully remove it.

4. You should now be able to remove your logic board. Holding it at the bottom, gently pull it upwards. I use my other hand to lift up at the top where the rear facing camera used to be.
5. Take note that there is a small rubber piece that sits at the top of the logic board. You will need this for re-assembly so make sure it doesn't fall off. If you lose this, you could see reception issues.

Remove the speaker assembly

1. To remove the speaker assembly you have one more #00 screw to remove. It sits to the right of the speaker assembly in the bottom right hand corner of your device. Remove it.
2. The second screw holding the speaker assembly into your iPhone you've already removed when you removed the logic board.
3. Gently lift the speaker assembly out of your device and set it aside.

Replace the speaker assembly

Replacing the cellular antenna

Reassemble your iPhone

And... done!