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Problem with iPhone 4s searching for signal, than to full signal, and back again?

Problem with iPhone 4s searching for signal, than to full signal, and back again? Can anyone help? On AT&T

iPhone 4S, iOS 5.0.1

Posted on Nov 20, 2011 11:46 PM

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129 replies

Nov 21, 2011 6:43 PM in response to modular747

I am having the same issue. I brought my iphone 4s to at&t first and they replaced sim card with no change in the problem. So i went to the apple store and they reset the network settings. It worked fine for about 10 days. Now its doing the exact same thing. I've reset the network settings 3 times already and nothing has changed. Its very frustrating. Any other suggestions?

Nov 21, 2011 7:19 PM in response to pianoman1231

You can try all basic troubleshooting steps like --

  • Try rebooting the phone
  • Restarting the phone
  • Taking out the SIM, even though the phone is still switched ON and then put it back again
  • Turning the 'Location Service' OFF


But to be honest, I have tried all of these but to any success. I guess there is some serious issue with this 5.0.1 update, which apple need to officially recognise and get a FIX in.....


Did anyone got any other tricks which can solve this problem??

Nov 26, 2011 6:53 AM in response to modular747

Well I guess that it's a matter of IOS but let's face the facts : if it really was a matter of IOS why would other IPhone 4S having the same version and the same modem firmware works just normal without any issue ??? So i guess that it's a matter of hardware problem but anyway we will wait to see what will be Apple next move so let's be patient and follow their paths ....

Nov 27, 2011 2:49 PM in response to Sputumballer

Since I was having the signal problem with my phone, was told by AT&T service rep. to turn off the WIFI from time to time; not to run WIFI all the time. I had a few curse words for the solution. But, gave it a try anyway. I am going on 4 days with no issues at this time. Don't know why this is only a iPhone 4s problem. NEVER had to do this with my original iPhone, 3,3g,or 4. I have only been turning on WIFI when I need it, hope this helps.

Dec 5, 2011 3:35 AM in response to Sputumballer

In Australia having the same issue. Currently there is a thread on a local tech forum about the issue wondering if the issue may be with 850MHz networks or the cell radio being idle. I have noticed when browsing using WiFi or just sitting on the lock screen it will lose it but when streaming radio over 3G for about two hours it had no issues. I had the buffer for the radio down to three seconds to if the 3G had dropped I would have noticed the music stop.


I have spoken to Apple and they suggested to do a restore of the phone but not to restore my backup. I had no issues with the streaming radio so I restored the backup and did another hour of testing with no dropout. WiFi was enabled in first test but disabled in test with backup restored (so it had to stream over 3G not my WiFi).


Any ideas would be appreciated.

Dec 11, 2011 1:27 PM in response to Sputumballer

You're screwed. I have an iPhone 4s and this started happening to me so I took it to AT&T and got a new SIM card. It worked for about 20 minutes. So then I went to Apple and they replaced my iPhone 4s with a brand new one, no questions asked. This worked out great for about 5 days, then back to searching. Obviously it is not a hardware issue and there is something wrong with iOS 5.0.1. Waiting on Apple to come out with a new update! 😟

Dec 15, 2011 12:42 PM in response to Sputumballer

well steve jobs died and now apple is going down the toilet. I got the 4s three weeks ago. Into the second week the "searching" began..so calling AT&T they did everyting they could and it came down to restoring the phone. This laster for a week, it randomly froze and began with the same problem. That night i went to the AT&T they replaced the sim and it didnt help. So from there i went to the apple store and the replaced my phone with no problem. Everything was fine until the next morning untill it started happening again. It cant be the companys problem, it started right after the IOS 5.0.1 update.

Dec 15, 2011 2:22 PM in response to Sputumballer

GUYS. I have had the problem since October 31st with my iphone 4. I had to wait for the upgrade and went to tmobile for not even a week then I noticed the iphone was working again so I cancelled. My phone was fine and dandy until Nov. 3, so I upgraded to the iphone 4s and not even a DAY LATER, the searching continued. NEW SIM, NEW PHONE, NEW EVERYTHING, even the phone number at this point b/c I had a NY number. I got it replaced by apple when I had a feeling it wasn't the phone but they insisted that would solve the prob & if not , it was ATT. Went home and it was fine for about 5 days. Happened again! I can't even count how many times but after the replacement and exhausting options, they changed my number to a 3rd number ... and that didn't solve it even though it solved it for the longest span of time since the iphone 4s came in. I went back and they opened an investigation and did all these things to my phone through tech support and got back to me sayin they found nothing .... it happend again even after that ... and they opened it again and that's when I decided to cancel before it was too late.


I now have the iphone 4s on sprint since December 10.... and thank goodness I think it was ATT ... but at this point I am hopeless and I expect it to happen ANY MINUTE. Keep me posted guys... is this only ATT or other companies??

Problem with iPhone 4s searching for signal, than to full signal, and back again?

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