14 Replies Latest reply: Apr 23, 2012 2:24 AM by nyotix
russmd Level 1 Level 1

My iPhone 4 keeps alternating between showing that I have a strong signal and then it starts "Searching" for a signal. Even when there is a full signal, sending a text or making a phone call impossible or very slow.  I've never had this problem in my home. Nothing has changed on my end.


Thank you

iPhone 4, iOS 4.3.2
  • Dadof2Girls Level 3 Level 3

    Do a hard reset on your phone holding the home / power button until the Apple logo comes back up.  Might be a hic-up.  Let me know how it goes after that.

  • russmd Level 1 Level 1

    I've tried;

          1) Turning it off/on

          2) Doing a Hard Reset as you suggested before I posted. I'm sorry, I should've been more specific.


    Thanks for the quick reply though.

  • Dadof2Girls Level 3 Level 3

    Is this the phone signal or the Wi-Fi signal?

  • Dadof2Girls Level 3 Level 3

    Something might be messing with the signal.  Any unusal or new devices that emit a signal?  Usually this is when the phone gets a 3G signal and then looses it and then trys switching the Edge and then back.  There are places in my house that are a pain.  Other than that, there could be an intermittent problem from your local tower.  I'd wait a couple hours and see if it keeps happening.

  • Brittybratd Level 1 Level 1

    ine is doing the exact same thing

  • Jacks0n Level 1 Level 1

    My iphone 4 that I have had for a year and a half just started doing this yesterday and hasn't stopped.  Every 30 seconds it has a signal and the other 30 seconds it is searching for a signal, no matter where I am and what kind of signal I have.  I have rebooted several times and removed the SIM.  Nothing has fixed the problem.


    Any advice would be great!

  • kc305 Level 1 Level 1

    My iPhone 4 just started doing this yesterday.  Strong signal, then searching, then no signal.  Drops all calls.  Any help yet resolving this issue?  Hard reset did not fix it.

  • Jacks0n Level 1 Level 1

    Apparently, this is a SIM card issue.


    Option #1 Try removing the SIM card, power down, re-insert the SIM card and power on.


    Option #2 This is what corrected my iPhone 4. Swap TE SIM card with another iPhone 4 users SIM, after a few minutes, replace your SIM card into your iPhone.


    Option #3 Have your wireless provider replace the SIM card. Should be free.

  • kc305 Level 1 Level 1

    Thx for the feedback.  Went to Apple store and they tried everything that you suggested.  I ended up with a replacement phone.  The old sim card works fine in the new phone.  Option #3 was suggested if the problem reoccurs.

  • anthonyfromanderson Level 1 Level 1

    I think i found out the solution. first unlock the phone then press settings then press general then press reset

    then reset your network. start the phone back up and go back to reset and this time click Reset all settings. start your iphone back up wait about a min or two and it should be fine. YOUR WELCOME i was about to return my iphone if i couldnt fix it lol but its fixed.

  • mistertofuu Level 1 Level 1

    OHHH i have a solution that happened exactly the same to me !


    At first it lagged then the next day it keep saying searching ALL DAY !


    Solution :

    1. (IMPORTANTLY) - Connect to itunes


    3. Restore to factory settings .

    4. Your phone will act like it was new .

    5. When it says WELCOME on your phone , Do all your setting on your phone

    6. When it says Back up as new phone or back up as (BLAHBLAH)

    7. I know that you would want to back up as before

    8. AFter it dones backing up like before ,


    -You should get signal and 3g and reception like BEFORE .




  • bcole79 Level 1 Level 1

    I have tried all of these and my phone is still searching. I have Verizon so, there is no SIM card. I live 2 hrs from a Verizon store and cannot be with out my phone. Anyone have a recent resolution???

  • nyotix Level 1 Level 1

    i hope this is not a hardware problem... it happened to me recently, ios 5.1. i think every 2 minutes the signal drops from 5 bars to no service. i thought tuning off/on the phone and removing the sim will fix the issue

    but i didnt. what i did was i turned the 3g off/disable in the network settings. as i turned it off, the signal became 5 bars again... after a few minutes i enabled the 3g again... and so far network signal is not that erratic

    dropping suddenly... i hope the said issue is permanently fixed...