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  1. Imp Beech's Avatar
    Unfortunately, that fix did not work for us on our Galaxy S4 with Verizon. In fact, like others, nothing has worked -- from factory resets to new SIM cards, etc. Shame on Samsung to knowingly ignore this common issue.
    Radiolaire likes this.
    08-28-2014 05:51 PM
  2. demonicfla's Avatar
    Hi everybody just made an account here because i was experiencing the same issue! I sent the phone for repair (still have warranty). In fact, the phone was shipped to the same facility as the person that posted a picture of the parts that were replaced. So hopefully they replace the same parts on my phone and it starts to work. Once i get my phone back, ill upload a picture just like the person above did and ill let yall know if i still get the issue or not.
    08-30-2014 11:52 PM
  3. tamiras's Avatar
    I had this problem and it turned out to be a software issue. I had transferred some apps over to my SD card and shortly after, I received this error message and my phone stopped working. I did a live chat with someone on the Samsung website and she told me to reboot my phone in safe mode (continuously tap on the down volume button during startup, "SafeMode" should appear on the bottom left of the screen if this is done correctly). Safemode cuts out all third party apps so regular texting/calling works still. The person from Samsung told me to keep my phone in safe mode for 24 hours, but I did some research and deleted all apps on my SD card and rebooted my phone normally and it now works. It's been working for a full day now so we'll see what happens.
    Kryste Odonnell likes this.
    09-05-2014 06:02 PM
  4. demonicfla's Avatar
    update: samsung couldnt find anything wrong with my phone, so i kept calling them over and over again telling them the issue. 2 weeks later they sent me back a new phone surprisingly !
    09-12-2014 09:42 PM
  5. antomac89's Avatar
    Hi guys,

    My S4 won't recognise my sim, this is the first ever problem I've had with the phone, I've tried everything from resetting the phone to trying another SIM but it didn't recognise that either?

    Is the best thing to send it into the service centre to get looked at?
    09-16-2014 06:11 AM
  6. gs warrior 88's Avatar
    I have had this problem before...went to AT&T and got a new sim card multiple times. Still getting this problem. After a lot of research sending my phone to Samsung found out it was an internal problem with the board. I have been dealing with it and resetting my phone atleast once a day for almost 2 months now. Waiting for the Note 4 to upgrade.
    09-16-2014 04:29 PM
  7. cyberprashant's Avatar
    We went thru 3 squaretrade waaranty replacements w this issue...finally they had to cash out the policy and i bought a new s5. New sim didn't help (was tried along the way ).

    Its a bad main board that causes this samsung should offer to replace all phones with tbis error even out of warranty
    Richard Scholten likes this.
    09-20-2014 08:52 PM
  8. fingertrick's Avatar
    I don't know your carrier. However Verizon said to me during my 5 s4 refurbished phone's which continually were bunk upon receipt after my accident with original one that he recommended trying a new sim. I said fine. Called back said no send phone too. They do seem according to the service and cyber that it's a phone known problem so don't be fooled. I for the record cannot speak to encountering the problem but resolving yours is more at hand and you should be aware of these issues as you can really not be for hours or pay money to try a free new one. FYI the style was different than originally sent meaning the size and contacts that are gold. They're approximately 2 years dated apart. So don't be surprised
    09-26-2014 01:35 AM
  9. hanzybeast's Avatar
    same issue on my S4.

    it started to ask for a reboot -because the simcard did not work- every day.
    now it just says that there is no simcard.

    when I swap sim cards with another phone; the simcard that was in my S4 does not work on the other phone. but a new sim works om my S4.

    does the phone break my sim card's functionality ?
    10-03-2014 02:16 PM
  10. NPinUK's Avatar
    My S4 has the no sim error restart phone problem. Its stock U.K. (BTU) and has never been rooted.

    1st occurrence within 3 months ownership but it got to a point, after a week, where it always read no sim even after restart. Samsung warranty repair changed mother/main board.
    Phone was dropping calls after the warranty repair so went back to Samsung. Warranty repair 2. Changed 2 wires, don't know which ones. But now phone was working fine.

    3 Weeks after repair 2, the screen went black. I could still hear all tones etc but no screen so can't answer calls (most basic function of phone). Samsung put new screen and another new main/motherboard. So now this is the 3rd mainboard. Phone came back on 2/10/14 after the repair. After 2 days I have again got message about 5 times at a time but restart is solving it for now.

    So I think the problem lies in the faulty mainboards Samsung are manufacturing. Why? Because my 1st board failed and eventually always had the message no sim inserted. The engineer report said main board was changed. If it was too do with a faulty sim tray then wouldn't they have fitted one of those instead. 2nd board worked fine even though calls were dropping. This board was in phone for 3 weeks until screen got changed so I'm presuming had to change board along with screen. The latest main board which is apparently new has lasted 2 days. Like I said above its only happened a few times so far but I rather it happen all the time so I can send it in again.

    I have spoke to Samsung UK escalation and they said if I require another repair then they will take it higher up but even with an exchange what is there not to say new/refurbished S4 wont be faulty down the line.

    What is Samsung doing about this, absolutely nothing. My worst ever experience with a phone and I got a s 1,2,3 which all still work not even a glitch. Will buy another phone but keep fighting for a resolution with this one. Still has 17 months warranty.
    10-05-2014 12:17 PM
  11. Livestrong Ajit's Avatar
    Well i just had this error tody so all i did was download MTK droid tools and pdanet+ on my pc the pdanet was used to download the adb driver so i don't know if youneed root for this but my phone was rooted. and the mtk droid tools might not work for you cause i think it is only for phones with mtk processor so google for a mtk droid alternate for samsung. What i did with the mtk droid tools was i clicked on the nvram/imei and a box appeared then open your phone battery write down the imei andconnect your phone with usb debbuging on let the pdanet popup appear click it it will connect the phone and then type the imei of your phone in the nvram/imei dial box in he first box and then click resotre
    10-06-2014 05:13 AM
  12. Lyndsee Burleson's Avatar
    I tried this and am hoping it will fix the odd SIM card issue. mine randomly throughout the day will just say not detected, will restart now. and provides me no other options. I hope your solution is the key!
    10-07-2014 10:49 AM
  13. hapaboyjr's Avatar
    I had to put a thick piece of paper above the sim card housing and put the back cover on. Seems like the contacts are not touching the sim card very well.
    10-07-2014 01:48 PM
  14. Coach88's Avatar
    I had this same issue with the SIM card. Samsung and/or the company I bought it from (Wireless Wave in Canada) would not honor the warranty because of a cracked screen, after a bit of a conversation with the manager at Wireless Wave, I think he took it upon himself to get it fixed locally at his expense. As I explained in another thread, my replacement (loaner) phone did the same thing within 24hrs of receiving it.... oh yeah... and the screen on that one wasn't cracked...

    Posted via the Android Central App
    10-11-2014 01:21 PM
  15. gonzojeff64's Avatar
    So far it looks like moving all my applications from my SD card to my phone storage has worked for me. Only time will tell though. My phone is out of warranty so I hope this works. Looks like Samsung has a major defect with the phone.
    10-14-2014 11:08 AM
  16. Mark Hersey's Avatar
    I didn't realise how common this issue is. My phone was doing exactly the same thing. In the end, Samsung just replaced the handset with a brand new S4.
    10-15-2014 04:25 AM
  17. mudbone9's Avatar
    I had this same problem with the S4. I was getting the "restart required unable to detect your sim card" at least three or four times a day. I performed the following troubleshooting steps in an attempt to fix the issue.

    1.) Factory reset twice.
    2.) Installed two new SIM cards.
    3.) Installed my SIM card in an S3 for 3 to 4 hours (probably not long enough though)
    4.) Went to Best Buy and had them reflash the phones internal memory.
    5.) Cleared the operating system cache by holding the on and volume up buttons on start up.
    6.) Called At&t tech support multiple times to troubleshoot the issue. Several tech's told me that my phone was defective and that I needed a new phone.
    7.) Installed the SIM Card Manager app and wrote one (bogus) contact to the SIM card.

    Well after all that the phone was still popping up with an error message forcing me to restart the phone. However the message changed to just "SIM card removed". I was one and a half years into my contract so replacing it was going to cost $199 with At&t insurance! I really liked this phone and as a programmer I originally thought I had a virus or there was something corrupted in the software but now I believe that it is a hardware problem. I searched the web and found a video on YouTube showing how to change out the SIM card holder. It took me less than 10 minutes to disassemble and remove the part. I ordered a new SGH-I337 SIM card holder on Amazon for $5.99 shipping/taxes included. Wish I would have known it was that cheap and easy to fix this problem. Because of this issue I had already cancelled my At&t contract and signed up with Verizon and now own an S5. Better phone, cheaper service and the insurance will replace the phone for half the deductible that At&t offered. However I am going to sell my old phone after I fix it which will cover my early termination charges with At&T. I will post my repair results soon.

    BAM! FIXED Extremely fast and easy repair. All for $5.99.
    10-15-2014 10:12 AM
  18. Coach88's Avatar
    I could go on a page long RANT about my dissatisfaction with WIRELESSWAVE (my provider), Samsung and Bell Mobility in Canda but i'm not... Instead I'll post the SOLUTION that worked for me. A reputable technician informed me that there's apparently an issue with the NFC enabled Micro SIM card and the Galaxy S4. Somehow, they are not compatible. Is this following the latest firmware update therefore Samsung to blame? Who knows. What I do know is that following this tech's advice, I finally found a "NON-NFC Sim Card". (Bell Mobility has discontinued them so they're hard to find) and when activated for my S4... VOILA! No problems for the past 16hours. As the salesman at the Bell Store pointed out, it's a workaround but i'm losing NFC functionality. My reply was that I was ready to sacrifice my NFC (I didn't use) for the actual use of my phone... seems like a no brainer. Hopefully, Samsung will figure this out and fix this Bug!
    10-18-2014 10:39 AM
  19. Jessica Gordin's Avatar
    I had the same problem, and i tried new sim cards but it was definitely an issue with the motherboard because after some time the same issue occured. I just tried a factory reset and so far so good
    10-26-2014 07:24 PM
  20. Coach88's Avatar
    I had the same problem, and i tried new sim cards but it was definitely an issue with the motherboard because after some time the same issue occured. I just tried a factory reset and so far so good
    Does your SIM card say NFC on it?

    Posted via the Android Central App
    10-28-2014 09:43 AM
  21. coop3422's Avatar
    I had an S2 and had nothing but issues with the charging port. It would think it's plugged in while it's not, on off, kill my battery within an hour from full, it was just terrible. Swore to be done with Samsung. After a couple years with a Nexus 4 and 5, I wanted an LG G2. Got a good deal on an S4 so I pulled the trigger. Now I'm having this issue. Samsung is just awful, at least for me. I may go the new SIM tray route, get it working and sell it and get a G2 like I wanted.
    10-30-2014 09:27 PM
  22. esldon's Avatar
    I have the same problem. My phone has lost connection with the sim card please reboot. I reboot and it finds connection without doing anything to the phone except rebooting. Sometimes it'll last another hour or so and the same problem again.

    I've also experienced connection problems with the provider who is rogers. I reboot and connection is regained.

    I think this is a Samsung hardware problem but I am not a specialist in this field so cannot be sure.
    11-06-2014 04:59 PM
  23. Coach88's Avatar
    Problem free for a couple of weeks with a non NFC sim card :-)

    Posted via the Android Central App
    11-06-2014 10:15 PM
  24. jcastilloalonso's Avatar
    I've been having this problem for a long time.

    Every single time I restart the phone, I get the error message 1-3 times and then it works without a problem until I manually restart the device for any reason.

    I noticed my problems started when I upgraded my MicroSD card, went from a Fat32 16GB Class 6 card to a ExFat 64GB Class 10 card. Ever since I filled the card more and use it more than before due to the new space, the problem appeared. Removing or using my old MicroSD card fixes the problem. I tried switching cards with my girlfriend's Note 3 and her card also sends error in my S4 and my card works correctly in her Note3 so that's not the problem.

    I guess that in the S4 since the MicroSD and SIM card use the same connector, something is triggering this behavior. I wonder if this is a software issue or a hardware one. But if you have problems, try going without a MicroSD for a couple of days an see how it behaves.
    11-07-2014 01:24 PM
  25. rabsp9's Avatar
    Funny you mention KitKat.

    This problem started for me the day I rejected the upgrade.

    have replaced the Sim, and cleared the cache partition, next is a factory reset.
    11-13-2014 08:25 PM
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