Poor WiFi Signal reception iPhone 4

Why does my iPhone 4 have a poor WiFi signal reception after my repair?

We’ve gotten this question quite a few times, “I replaced the screen on my iPhone 4. Everything works but now I have poor a poor WiFi signal reception. What’s wrong?”

What could be causing poor WiFi signal reception  in my iPhone 4?

Take a look at the photo below.

  1. The EMI shield that covers all the cables need to be on. If you have neglected to put back the shield cover then that will be part of the poor wifi signal reception problem.
  2. The top center screw which happens to be the longer of other 5 screws needs to be present. That screw not only holds down the EMI shield but a little silver connector on the EMI shield to the logic board.

If that screw or the little silver connector is missing, you will have a weak or poor WiFi signal reception on your iPhone 4.

Poor WiFi Signal reception iPhone 4 Photo

How to identify your iPhone model

 iPhone Model

IconiPhone ModelYear IntroducedModel Number*Capacity
iPhone 4S2011A138716, 32, and 64 GB
iPhone 4S (GSM China)2011A143116, 32, and 64 GB
iPhone 4 (CDMA model)2011A13498, 16 and 32 GB
iPhone 4 (GSM model)2010A13328, 16 and 32 GB
iPhone 3GS front and backiPhone 3GS (China)2009A13258, 16 and 32 GB
iPhone 3GS front and backiPhone 3GS2009A13038, 16 and 32 GB
iPhone 3G front and backiPhone 3G (China)2009A13248 and 16 GB
iPhone 3G front and backiPhone 3G2008A12418 and 16 GB
iPhone front and backiPhone2007A12034, 8, and 16 GB
* You can find the model number on the iPhone’s back case.

 

Identifying iPhone model features

iPhone 4S

  • The iPhone model number on the back cover is:A1431 on the iPhone 4S (GSM China)A1387 on the iPhone 4S
  • The front and back surfaces are flat and made of glass.
  • There is a stainless steel band around the edges.
  • The volume up and down buttons are marked with a “+” and “-” sign.
  • There is micro-SIM tray on the right side that holds a micro-SIM card.

iPhone 4

  • The iPhone model number on the back cover is:A1349 on the iPhone 4 (CDMA model)A1332 on the iPhone 4 (GSM model)
  • The front and back surfaces are flat and made of glass.
  • There is a stainless steel band around the edges.
  • The volume up and down buttons are marked with a “+” and “-” sign.
  • The GSM model has a micro-SIM tray on the right side that holds a micro-SIM card.
  • The CDMA model does not have a SIM tray.

iPhone 3GS

  • The iPhone model number on the back case is:A1325 on the iPhone 3GS (China)A1303 on the iPhone 3GS
  • The back case is made of plastic.
  • The imprint on the back case is the same bright and shiny silver as the Apple logo.
  • The serial number is printed on the SIM tray.

iPhone 3GS dimensions

Back of iPhone 3GSiPhone 3GS SIM tray

iPhone 3G

  • The iPhone model number on the back case is:A1324 on the iPhone 3G (China)A1241 on the iPhone 3G
  • The back case is made of plastic.
  • The imprint on the back of the phone is less shiny than the Apple logo above it.
  • The serial number is printed on the SIM tray.

iPhone 3G dimensions

Back of iPhone 3GSiPhone 3G SIM tray

iPhone

  • The iPhone model number on the back case is A1203.
  • The back case is made of metal.
  • The serial number is etched in the back case.

Original iPhone dimensions

via [Apple Support]
iPhone Model.

iPhone 4/4S Back Cover Glass Replacements

Where to Buy a Rear Glass Cover for the iPhone 4 or iPhone 4S from? Look no more, we have iPhone 4 and iPhone 4S back cover glass back in stock. A rear cracked panel is very easy to replace. It’s just two screws to remove the rear cover of an iPhone 4.

iPhone 4

 iPhone 4S

Please remember to remove any protective plastic before installing your new replacement part.

protective-film-iphone-back-cover

 

 

 

How-To Fix an iPhone 4 Front Glass Digitizer Replacement Repair HD Tutorial

iPhone 4 repair Glass Screen

http://iphoneshopusa.com/iphone-4-repair-kits/132-iphone-4-repair.html If you have dropped your iPhone 4 and thinking about repairing it yourself then this video is for you! You can’t go wrong with this step by step HD tutorial. It will guide you from beginning to end. The most complete and best iPhone 4 dis-assembly and assembly tutorial on the Internet.

What you’ll need: iPhone 4 repair the glass screen

http://bit.ly/ieXA8P – iPhone 4 Printable Screw Organizer sheet
http://bit.ly/dXFPBO – iPhone 4 Complete front assembly LCD and Digitizer
http://bit.ly/haZeUJ – iPhone 4 Small Phillips and Flat Head Screwdriver
http://bit.ly/gkV765 – iPhone 4 Small Pentalobe Screwdriver
http://bit.ly/hYc3wQ – iPhone 4 Plastic Case Opener Tool
http://bit.ly/h2Dvyq – iPhone 4 Sim Tray Removal Tool

Instructions for iPhone 4 repair

This tutorial will work for the SIM card version of the iPhone 4

Head over to http://iphoneshopusa.com for all your iPhone 4 parts and complete iPhone 4 repair Do-It-Yourself Kits.

Step 1

 

Congratulations on your iPhone 4 repair!

 

 

How To Fix an iPhone 3G / 3GS Broken Screen Glass DIY

Instructions

Things You’ll Need:

    Taking the iPhone apart

  1. Step 1

    Turn off the iPhone. Remove the SIM card by inserting a paper clip into the small hole at the top. Remove the two screws at the bottom. Push the suction cup onto the glass. Pull up to separate the glass.

  2. Step 2

    Three cables will hold the two pieces together. Remove the first two using a paper clip. The third is beneath a tab under the first two cables. The last cable should be pulled out gently.

  3. Step 3

    On the screen, remove six screws: two on one side, one on the bottom of the surface behind the glass, one visible on the other side and two under tape on that side.

  4. Step 4

    To remove the LCD, use a paper clip on the sides to hook the bottom corner that has a circle, and pull out.

    Removing the broken glass

  5. Step 1

    Using tweezers, remove the black tape behind the glass on each of the four edges.

  6. Step 2

    Use a hair dryer around the edges of the glass for about 5 minutes to heat the glue.

  7. Step 3

    Pry the glass from the plastic holder. Be sure to remove all the broken glass.

    Installing the glass

  8. Step 1

    Put the adhesive strips at the top and bottom of the plastic holder.

  9. Step 2

    On the new glass screen, remove all the film from the black bottom and top, leaving the protective film on the glass so no fingerprints will get inside. There will probably be two pieces of film on the black parts.

  10. Step 3

    Line up the glass with the holder, making sure the cable goes under the holder. When the two pieces match up, press down to stick the glass to the adhesive strips.

  11. Step 4

    Remove the film from the glass.

    Reassembly

  12. Step 1

    Put the LCD back in the holder with all the holes for the screws aligned. Press it in place. Replace all the screws.

  13. Step 2

    Press all the cables into place in the reverse order of their removal.

  14. Step 3

    Align the two pieces — the screen and the unit — and press them together with the holes lined up.

  15. Step 4

    Replace the screws and your SIM card.

Tips & Warnings

Resources