We want to provide you with the most accurate and complete knowledge for cell phone repair. Our expert technicians have answered our most popular questions to the most common issues that arise during the repair of an Apple iPhone 4 & iPhone 4S repair.
Apple iPhone 4 GSM/CDMA & iPhone 4S common repair questions:
I replaced the screen and now the phone is not powering on, what can I do now?
1. Does the vibrator work if you flick the switch? If so, the phone powers on so try a soft reset.
2. Make sure all of the cables are plugged in, including the battery.
3. Disassemble iPhone and carefully remove LCD,
check for tears in the LCD / touchscreen cables upon your installation.
If you find a tear, it is not warrantable and you must install a new LCD /touchscreen.
4. Try to replace the battery. You can purchase a replacement battery here.
5. Check and make sure the battery terminal on circuit board is not loose or broken.
6. Send your device to Phone Doctors for professional repair services.
I replaced the screen and now the phone is pulling little to no service, what can I do now?
1. Make sure the antenna cables are plugged in. The GSM iPhone 4 has (1) Antenna Cable, the iPhone 4S and the CDMA version of the iPhone 4 has (2)
2. Did you damage the antenna connectors while installing cables?
–> If yes, mail your device in to Phone Doctors for National repair service.
–> If no, continue to step 3.
3. Remove the speaker dock assembly located at the bottom of the phone and replace the charging port flex/assembly.
4. Send your device to Phone Doctors for professional repair services.
I replaced the screen and the wifi is pulling little to no wifi, what can I do now?
1. Make sure the antenna cables are plugged in and that the connectors aren’t damaged.
2. Replace the black EMI shield that covers the flex cables
3. Remove speaker dock assembly on bottom and replace the charging port flex.
4. Send your device to Phone Doctors for professional repair services.
I replaced the screen and now it is not charging, what can I do now?
1. Make sure the charging port cable is plugged in. Located on the left side of the battery removal plastic tab. You must remove the (2) screws holding the shield in place to verify.
2. Replace the charging port flex cable/assembly.
3. Check and make sure the charging connector (where charging flex plugs in) on the circuit board is not broken or damaged.
4. Send your device to Phone Doctors for professional repair services.
I replaced the screen and now the ear speaker is really low, what can I do now?
1. Adjust the ear speaker to make better contact with the circuit board. (Gold prongs on ear speaker should point towards the top of the iPhone.)
2. Replace the ear speaker.
3. Send your device to Phone Doctors for professional repair services.
I replaced the screen and now the front facing camera is not working, what can I do now?
1. Disassemble your iPhone, remove the touchscreen/LCD assembly and make sure the front facing camera is properly plugged in.
2. Replace the camera
3. Send your device to Phone Doctors for professional repair services.
The power button does not click and will not power the iPhone on, what can I do now?
1. The power flex most likely needs to be replaced. Difficulty: High
2. For this repair, we highly recommend that you send your device to Phone Doctors for professional repair services.
Issues stemming from faulty or damaged power flex:
- iPhone will not power up
- iPhone proximity sensor may not work, FaceTime / When on speakerphone people can’t hear you talking.
Possible Headset flex problems:
i just replaced my iphone 4s screen and i tought everything went smoothly now it says searching at service bars,and it looks like it dont recognice sim card if i pull it out while phone is on it doesnt say no sim card or sim removed please help out
It sounds like the antenna wasn’t plugged in correctly or the antenna may have been ripped. You may want to try our national mail in repair service or you can try calling 1-855-234-9483.
I have an iPhone 4 and just replaced; LCD/digitizer, proximity sensor, audio jack ribbon, ear speaker, antenna/metal tabs on speaker and new battery. After complete reassembly, everything worked perfect except proximity sensor. Disassembled again to put small glass with gasket on proximity sensor and when reassembled, the speakerphone doesn’t work. Voice record, music and you tube video works perfect, but when on a call and I hit speakerphone, I can’t hear and can’t be heard. I also have no sound when trying to record a video. Any ideas? The small gold tab broke off EMI/antenna stick on that attaches to the speaker, but I am pretty sure this has more to do with signal than anything. Any help is welcomed!!
Hi Dan. If you ordered the part from us, give us a call with your order number at 1-855-234-9483 and one of our techs will be glad to help you determine the problem. You can also use our national mail in repair service to get your phone back in working order. It sounds like you may have a loose connection.
i drop my iphone 4 today and my screen broken relly badly, and my camera is not woring front or back is not working. is that common when a screen get broken badly? if i get the screen replace would that solve the problem with my camera?
Not a normal issue. The camera could be unplugged but it’s tough to say. I would mail it in to us and we can test camera issue before replacing the LCD screen. Please visit: http://phonedoctors.com/mail/
I replaced my iphone 4s screen and digitizer. It had went out the other night after dropping the phone. I could still hear the phone ring and text messages being received…just nothing on the screen. After replacing, my phone now only comes on when i have it plugged in w/ the charger. It says the battery is 100%.. It also is continually searching for service and will never find service. Unable to connect to wifi as when i go to the setting it says wifi is off and won’t let me turn it back on. Once i unplug from the charger my phone shuts off and nothing will work until i plug it back in.. Seems like it’s more than just a bad battery.. I checked the antenna and looks to be in good shape and is plugged in fully. Any ideas on the problem?
It sounds like you ripped the battery or battery terminals. If you want to mail it in, we can diagnose and repair the device for you.
i have iph0ne 4s cdma i have change my touch panel but still my touch is not working
You may need to open it back up and go and check all of the connections. If you are still stuck, mail in your device and we will be happy to take a look at it for you. http://phonedoctors.com/mail/
I replaced the charging port and now it only charges when it’s off and slowly too. It can’t connect to the pc because it isn’t a recognised on the windows pc anymore too so it also doesn’t connect to iTunes. I tried holding the power and home button till it goes off and goes back on again with the USB to ITunes logo. That still doesn’t work…. What can I do?
Hi Phoung. It could be a variety of issues. The only thing I can recommend is to send it in and have one of our technicians look at it: http://phonedoctors.com/mail/
Tell me if this issue was resolved as I have the exact same issue! Email me
Thanks Harrison,
There are three possibilities here:
1.) The cable you are using to charge the device has gone bad.
You can trouble shoot this by testing your cable on different phones, and if it has the same issue, then we know it is the cable.
2.) The charge port may be defective, not plugged in properly, or was damaged during installation.
Start by breaking your phone down again, and double check that your charge port has a solid connection. Also check for any signs of damage such as scrape marks, crimped cables, or broken “teeth” of the interior of the charge port. Reassemble your device, and if the same issue persists, then…
3.) The battery may be loose, damaged, or defective.
Unplug your battery, and check that your battery terminal (the part where your battery plugs into the motherboard) has all four copper prongs and is free of any debris. If all looks intact, and your battery has no signs of damage; reassemble your phone and test everything again.
At this stage, if you still have the same problem, then it is likely you have a bad charge port, and can resolve the problem with a new one. It also would not hurt to change the battery at the same time just to make certain all possible issues are solved.
I replaced the front assembly (LCD, digitizer, etc) on my mother’s iPhone 4S. While it was broken she used another phone that she had, which required a different sim card due to the size. Everything went together perfectly fine and everything I tested seemed to be working fine (without service). She went to get a new sim card for the iPhone and now she can send and receive text messages, but not phone calls. Nothing happens at all when you try to call her. I’m not sure if this is an issue with the provider having to disable/enable various sims or if it’s an issue with the phone so I thought I’d ask for some possible insight. It seems to me that if it were an issue with the antenna (or something else in the receiving hardware) she wouldn’t receive text messages either.
Thanks in advance!
Nevermind. I fixed it. Thanks though!
Hi there,
I just replaced the light proximity cable on my iphone 4 and everything seemed fine until i noticed that the touch screen doesn’t turn off when I held it against my cheek during a phone call. I reseted all my settings but it didn’t do anything, any idea what went wrong?
Thanks for your time
Yes, the proximity is what causes the effect that you’re talking about. So something may have gone wrong with the repair. Please call 1-855-234-9483 and give your order number so that you can speak to a technician. You can also email your question and ask for a technician response by sending an email to support@phonedoctors.com
Would it be the same buying a colored screen for an iphone 4s as replacing/repairing an lcd screen, or would i need to buy both?
Great Question! When you buy a color screen from Phone Doctors, it includes both the LCD and Digitizer.
Also, is it possible to buy parts, such as a color screen, and send in the iPhone to have you guys change the parts or does the customer have to do it? If so, would it cost extra to send it in? How much?
We can offer you the parts and provide the repair and/or installation. Due to our high quality control and standards, we only warranty repairs by our technicians when we provide the parts. Please call 1-855-234-9483 and we will be glad to help you.
Hi i have a iphone 4 and just replaced the screen everything looks good but the touch screen dont work. I cleaned the digitizer, and restarted my phone over and over. Plus the battery always say 100% but once i unplug it, it dies
Hi Rob. I recommend a full diagnostic from Phone Doctors. You can call us at 1-855-234-9483 and go to http://PhoneDoctors.com/mail and send it in.
So I replaced my cracked screen after watching your video and I must say the video was very informative but now the screen is fuzzy at times please help
Give us a call with your order number at 1-855-234-9483 and we will have one of our techs help you out.
I replaced the screen and charge port cable after ripping the original replacing the screen. Now the wifi doesn’t work unless I am right next to the router. Also it charges fine but if I dock it on a speaker dock it doesn’t output through it. I took it back apart and checked all the connections on the speaker module, the piece on the battery connection and the piece by the top shield and all seem fine. Is there something I am missing or how much would something like this cost to get fixed?
Hi Loren. Give Phone Doctors a call with your order number at 1-855r-234-9483 and one of our technicians will be glad to help you. You can also mail in your device for professional repair at http://phonedoctors.com/mail/
got my screen replaced on iPhone 4s a week ago and some of my calls are not coming thru…i only know due to the person leaving voice mail. Also my pandora will play a few songs and then it takes a few minutes for another song to start. Have you heard of these issues? Thanks!!
Due to the inconsistency of these errors, our technicians suggest taking your phone to your service provider, and see if there may be some type of network issue causing the lack of consistency with your reception.
Should this not solve it, then there are multiple internal items which may be causing this issue. After talking to your service provider, we suggest sending in your device for diagnostic testing by our technicians.
All of our mailing information can be found online at:
http://www.phonedoctors.com/mail
Hi,
I replaced my 4s screen, and my wifi is receptions is weak now. What are the parts to look into, as i see emi shield for 4 and 4s are different.
Thanks for your input.
Thanks,
Two possibilities here:
1.) There is some type of a network issue, and you should contact your service provider first to see if something may need to be reset on their end.
2.) Your antenna (located on the bottom of your device above the ringer speaker box) is either damaged or unplugged. Simply open your device, and double check your antenna to make certain it is plugged in correctly. If this cable is either nicked or torn, then you need a new one.You can find this part available here:
iPhone 4:
http://phonedoctors.com/product/apple-iphone-4-3g-antenna-part-only/
iPhone 4S:
http://phonedoctors.com/product/iphone-4s-wifi-antenna/
After replacing the lcd/digitizer and glass on my iphone 4 Im having the following problems;
- calls are dropped randomly
- the headphone jack isn’t working
- the front facing camera isn’t working (not super important)
What can I do? I know that things can be as simple as screws in the wrong spot…
Thanks Amanda,
There are a couple of connections to check:
1.) Your antenna located on the bottom of your device, found directly above the oblong shaped box above your charge port. Make certain this antenna is fully plugged in. This should help your call drops.
2.) Your headphone jack flex found at the top of your device. There is one tiny plug in found above your battery, next to the spot your LCD plugged in. Make certain this is connected.
3.) Your front camera is the most tricky as it is located under your LCD screen. You will need to deconstruct your phone (don’t crimp or tear the flex cables) in order to check this part.
You can also mail-in your device to us, and let our technicians take a look at:
http://www.phonedoctors.com/mail
On my iphone 4 with phone face up the far left prong in the charge port is broke off how serious is this and what issues could this cause this phone is brand new
Thanks Johnny,
The important part of the charge port is the central “tooth” (the long middle piece). If this part is damaged in any way, then you need a new charge port. Our technicians can fix this part for 45.00+shipping if you are not near one of our locations. No shipping if you walk the device in.
If the prong you are talking about is one of the metal hooks at the very edge, then your charge port should be fine. This prong locks your charging cable into place. As long as you plug in your charge port securely, your phone will charge as normal.