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iPhone constantly searching for carrier (no service)

Hi,

I dropped my iPhone, and now I get a "no service" message.

When the phone boots up (or after switching the airplane mode on and off) it finds the signal (at the weakest level)—but after 10 seconds, the signal is lost and the phone starts searching for the carrier again...

Everything else works normally (WiFi, etc.), and I can use it as a "Skype" phone, listen to music, and surf the web.

My OS is 3.1.2 (with 05.11.07 baseband).

I tried the following (without success):

  • Doing full restore with DFU mode on clean iTunes
  • Opening the iPhone and making sure no cables are loose
  • Switching off 3G

Does anyone have any advice? What else could I try?

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I was buy one I phone 6 from Singapore.then I used in other country when I insert Sim showing net work then suddenly lost my signal showing searching.what I need to do

さんによる

Yor network connector connection is loose i saw a such type of fault and also solved it also

さんによる

i have katy's new iphone 5 put the sim it works put the apple id in it works but now no service what do i do

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The best solution to this problem is take out the sim and put it in the iphone/ phone which is working fine . The usual problem to this issue is the sim is screwed up and it is a problem from the network service provider. Also , this issue comes if the phone is thrown or have fallen off from a place. Very commonly seen only in the iphone.

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25件の回答

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If the SIM card is properly in it's place, then you should read the following:

Since the iPhone is getting a weak signal and loses the signal within a few seconds, I would say that there is a problem with the antenna area (connectors/antenna).

If full reception is available, but the iPhone loses the signal within 5 to 10 seconds, it would normally be a defective power amplifier or a broken antenna switch (most likely the switch would die first when a phone is dropped).

The "no service" message in those two cases is normal: the phone receives the signal but the BTS (Base Transceiver Station) does not receive a signal from the phone (something like a handshake). So it does not "lock" the "cell" to the phone and goes on; it simply doesn't see or hear the phone, and that is the short explanation for why you get the "no service" message.

But what now ?

If there is nothing to see from the dropping and the phone is still under warranty, go to Apple!

If not, open the phone and check the connector between the dock connector and the logic board: it may be slightly dislocated.

You wrote that you checked the connections. This could mean that the antenna is defective, but check the connections again. Checking is better than buying a new part ;-)

Here is the guide for the dock connector.

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12 件のコメント:

Thank you very much for taking your time and helping me with this problem.

The SIM card contacts are surely OK, the connector between the logic board and dock connector is also OK.

How can I check if the antenna switch is broken, or alternatively how can I check that the power amplifier is defective?

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checking the switch is mostly not that easy possible, if they are broken - the parts will fall apart while desoldering (with hot air) - but normally the parts stick on their solderpoints - but betwenn the points can the switch be broken, if the pa is broken you can't check that either - normally there are a few different tools to measure the pa and switch. without the probper tools is there no way you could fix that by yourself - sorry. but since your problem is a little bit different, i would first try to change the antenna.

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my iphone 5s got the same problem after i dropped it it went searching and sometimes the signal is back when i reset the network settings and turn on airplane mode turn off my iphone and turn it back on but after or lateran in the day it goes back to searching please help me ...

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@Nai Peng Jiang did you solve the problem by now?? I got this exact problem..!

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My iphone 4s heats immediately like it was used for an hour when i switched it on, my carrier keeps searching and no network is found rather it shows no service. I didn't drop the phone either. It was working fine the other night when i was talking on phone. But since the day of that morning it continuously heats up and keep searching network. Just now i reset the network settings and typed this message. Please can you guys HELP ME!!!! what could be the issue???

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I had exactly the same problem with iphone 4.

This is what I did:

1. sync and backup phone on itunes

2. settings - general - reset - erase all content and settings

3. set up phone again using itunes backup

It did the trick!

Goodluck

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5 件のコメント:

i did the reset and it worked

very very happy

becky

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Worked for me too

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Thank you so much...it worked for me

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hi i forget icloud id piz help me friend .....i want to open my phone so friend help me......how can i do ?

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help me my facebook id sirjan.gautam.39

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iPhone no service error 100% fix in 5 minutes

I had this issue for about 1 month & i went through everything- Googling,yahoo search & apple discussion.

At last I have fixed my iPhone4 in 5 min.

First of all u need to know if it a software or hardware issue-

1. Toggle airplane mode for 4 seconds & wait for network.

2. Reboot iPhone.

3. Network reset.

4. Manually choose network.

5. Hardware repair method-

(Switch off your iPhone & take out the sim tray before continuing)

Take out the 2 screws from the bottom near the speaker mesh. Slide up the back panel & take it off.

Now take off the battery by taking off the little screw on the battery terminal.

You will find a very thin black wire near the battery terminal with a small plate on its end.

Near the terminal stand u will find a place to fit the plate. First clean the plate with a cotton cloth gently.

Connect plate on its place it & press it a little till u hear the little sound- tick.

(*Remember not to press so hard*)

Connect the battery & put the screw back. Get the back panel again & put the bottom screws.

Yippee..!!! U have fixed the annoying- NO SERVICE error on iPhone 4.

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Try checking if the sim card is in right, it might be not properly in it's place, use this guide to guide you.

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There is a TEENY TINY inductor on the motherboard which is apparently very easy to knock loose of the soldering and therefore breaks the antenna circuit if is dislodged, I would look at that if a software solution is not helping. Most of us doing first time repairs were entirely unaware we'd lost it most likely when we first removed the motherboard's last screw under the "Do not remove" warning tape. I had no idea why my new screen worked so beautifully but I had a whole new problem of "no service"! I tried everything and found no solution until this (thankfully someone figured out what no one else had)

Check for this component either missing or loose and/or damage to circuit traces in this area. Also check that the dock connector piece hasn't come apart at the seam and lost the spring loaded pin which is supposed to contact a small pad on the motherboard - too tight screws or the wrong screw can cause the board to bend just enough to break that contact because it lifts away from the pin also.

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hi, here is what can be done to rectify the problem..iphone like any other phone is fragile....one need to be careful with it always....since your iphone dropped the possible problem that arrive from it is that..your iphone must have loose which cause no service problem..since sometimes the sevice we show up and later dissapear..look for a tech that knows well about the iphone and let them loose the iphone to the back side and tighten up any loose part....am sure this would work.

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i have the save problem in UAE, the problem comes from the LTE network.

the problem solved as the following:

1- make factory reset and complete format

2- after formating and while activating your phone , you will get message from your carrier saying that there is a carrier network update, this update is for the LTE .

Don't update the carrier and keep using normal or 3G, then the problem will solved.

note:

before update you will see you mobile like this:

setting -general - cellular - cellular data & Enable 3G.

after :

setting -general - cellular - cellular data , LTE, .......etc.

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this worked for me. my phone recently just started to have "no service" problem. Every so often it will come and go. I usually just fix it by removing my sim card and then rebooting my phone. But today no matter how many time i do it, still didn't fix it. So I erased my iphone and it worked. It solved the problem. Make sure you have a back up on icloud so you can restore all your files after. hope this helps.

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Maybe this will help someone, or bring us closer to solution.

Hey, I have similar problem. Iphone 4 looses carrier randomly, normaly after few hours. If I just reset it, it doesn't help.

However, what helps is this: I wrap it in a plastic bag or plastic foil for food and put it in a deep freezer for a hour or so.

Then I take it out of the freezer, wait few minutes that it warms up a little (this is the critical part for moisture ---thats why it is in a foil) and then power up and it works for another few hours.

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No service I phone 6

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hi all

I dropped my 3gs this morning and it went searchingall day ,When I power down it would come on wit 1 bar for a minute and then searching

again Reseated the sim and exact same ,all this time the WIFI connection worked to my wireless lan.

I tried my sim in my work phone and bingo no service

then put my work phone sim in my Iphone and all worked immediatly.

No logic bt ssim broken in fall not phone problem at all.

Hope this helps some of you

Ronan

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hey guys, i had the same problem on my wife's iphone 3gs, i tried so many ways but nothing, i took it to a store and he fixed it for a 20$.. but again i had the same problem today with my iphone 3gs, but i google for a help and here is what i got and it worked perfectly :

"Use old SIM card, putting the old SIM card in the iphone (respring) then remove it and replace it with ur SIM and here it goes working again"

hope it works with u guys it worked for me.. best wishes and good luck.

Jami from lebanon

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Sounds like you Blue inductor got damaged. Check your motherboard if the blue inductro is damaged or missing.

See the picture below.

Block Image

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After taking a dip in the pool, I was stuck in the Searching... mode for a day. Everything else worked on the phone. I tried rebooting. No go. Came to this site and attempted to try the "back up iphone and reset all settings" While backing up the phone, I decided to put a the phone next to my portable heater.

When I connected to iTunes, it was waiting for the ios 6.0.1 update so I decided to update. It was under the heater for about 10 minutes and after the reboot of the phone after upgrading, the phone works now. Hope this helps someone.

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i updated my iphone 3g on iso 4.2 but after updating when i insert sim card into it only 1 signal appears after 5 seconds i lose this signal what can i do with it? Help me

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hiya followed Ifixit to repair Iphone 4s all went fine but had "scanning" no service" on, messaging, wifi and phone calls worked fine so knew nothing could be seriously wrong checked battery connector spring clip was touching rear cover all ok tried setting time n date(was at 1 jan 1970) that dod'nt work, re booting never done trick turned on 3G and hey presto it stopped scanning and found carrier(O2 uk) and auto time n date worked turned off 3G and all ok now hope this helps someone else best regards

Darkman

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hi

i have iPhone i restored & update it after update i lost my icloud id, so i bypassed jailbreak & bypass icloud id, now i am facing a problem no service or searching signals, and there is no carrier option show what can i do please help me.........................

shehry bird

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usually in that case bro when u bypass the icloud passwords and go into the iphone there is no going back. It wouldnt be possible if u wanted to factory unlock it

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But i think if u get redsnow on cydia and buys the R sim for ur version i think u can get service there is a website where they show u the tricks. But sorry bro cause i dont know the links

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Hi I too had this problem with iPhone 6, try this first, click settings, carrier, see if 'auto' is on if so switch off, wait for list of providers and click on your provider, this may resolve the issue. Leave auto off!!! Hope this helps

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my phone 4s wont even get service it says searching for 2 days now and it says network not available but everything else works fine such as wifi and screen

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Same problem facing after I dropped my iPhone 5. I saw power button permanently pressed what should I do?

~Jiten

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My iphone 6s shows NO SERVICE problem i tryed different sims but the same problem as been shows.i tryed 5/6 method to solved the problem but it dnt work.plzzz can you guys HELP ME!!! what could be the issue

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When screens are replaced and the battery is unplugged then the clock and date resets to 1970 (dont ask lol) but if you tryed all others and sometimes its all down to going on the clock time change the time and date and that will get your service back but i only know this works with the iphone so good luck,

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hi guys my iphone4 is showing no service and there is no carrier on my setting. my version 7.1.2 please help me tell me solution

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1. Check the World Clock and delete any world clock settings. Then reboot. If this does not work

2. Go to Settings > General > Date & Time. Manually set the Date and Time Zone to your time zone location. Then reboot.

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Hey guys ... did anyone fixed his problem with no service issue as I had the same ..

Any update please ?

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if restore any iphone while it say no service you will break it cause it wont activate without celluer network basically bricked

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Switch off the battery saver. It will do the trick. Don't turn it on again otherwise the network will be lost again.

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bole5 さん、ありがとうございました!
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