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[Q] help with spontaneously unrecognized SIM card

Ok, I'm going to give you guys the whole background story just to cover all the bases.
I've had a Nexus S for about 6 months, never had a hitch. Rooted it, etc etc all fine and dandy.
About two weeks ago, I updated it to CM 7.1 RC1. So far so good.
I've always had the same Vodafone SIM card, which has accompanied me through a couple of phones. Last week, I went to London and bought a UK pay as you go card, to use data without roaming. Perfect. No problems whatsoever.
So, to make it clear, I never had problems with my original (portuguese) SIM card, nor with the british one I had just bought.
However, it was upon my return that I realized I had forgotten my SIM card at my friend's house. I quickly stopped by the Vodafone store at the airport, where they promptly gave me a new SIM, ready to use within a couple of hours.
Since then, my phone after a short period of being on, spontaneously fails to detect the SIM card/no longer recognizes it. I've tried scanning for networks in the settings, but it won't let me register again. It takes a reboot to get it working. Thing is after a couple of minutes or hours, it happens again.
I have since exchanged the new SIM card with a newer one , also from Vodafone, albeit a different store. Yet, the problem persists.
I didn't alter any settings between Portugal-UK-Portugal, so everything should be exactly the same. Does anyone know how to solve this or why this happens?
Faulty phone?
Faulty radio?
Faulty SIM cards?
ROM bug?
Any help is appreciated.

Nexus 5 Sim/Radio Issues

Two months ago my Nexus 5 would start randomly losing signal or say that there was no sim card inserted. After a few reboots it would recognize the sim and let me use it normally, but when the device gets turned off and turned back on again there would be no signal.
More recently my Nexus 5 just says no sim card inserted but when reinserted it gets detected with no signal. Is there anyway i can fix this issue as i got signal yesterday but sadly restarted my phone because of a graphical issue and i lost the signal again. I have also done a factor reset and re-flashed android. Any help would be useful!
(Yes i have tried other sims and same problems)
Current Network: iD
Other Networks Tried: O2,Orange,T-Mobile.

Since the phone behaves the same way with different SIM cards, it could be a hardware failure with the SIM card reader.

audit13 said:
Since the phone behaves the same way with different SIM cards, it could be a hardware failure with the SIM card reader.
Click to expand...
Click to collapse
But sometimes it will detect the sim and give me a signal and if i restart the phone it will not detect it again. If it was something wrong with the sim reader wouldn't it just not work at all?

Not necessarily because it should always detect the presence of a SIM card, active or not.

Most likely, there's a bad solder joint somewhere, it would work after a few restarts because the metal would expand as the phone heated up and make contact again. You could try to bake the logic board, might fix it. But, realistically, it's a long shot.
Sent from my Nexus 5 using Tapatalk

OnePlus One and Samsung Galaxy S7 loses reception randomly

Hi,
I initially started with a OnePlus One and it came to a point where I would lose reception (Both data and mobile) maybe once an hour. The only fix was to restart the phone. I got fed up with it so I ended up getting a new phone, the Samsung Galaxy S7. It's been 3 days and I haven't found any problems, however, this morning I found my phone to have no reception. I restarted it and it started working again.
Could this be a SIM card problem? WiFi works fine.
Thanks

Not sure about the OPO but i had this happen to me where i lost reception for no more than 30s.
For you to restart the phone to get a reception is news to me and honestly have no idea.

I don't know how easy it is for you but with my operator it is very easy to just pick up a new sim card and ether have the shop to register the new card or do it by myself online. If the card is the same as the one you used with the OPO a new card would be the first thing to test. I have heard of lost reception problems were a sim card has been the culprit.

TastyBiscuit said:
Hi,
I initially started with a OnePlus One and it came to a point where I would lose reception (Both data and mobile) maybe once an hour. The only fix was to restart the phone. I got fed up with it so I ended up getting a new phone, the Samsung Galaxy S7. It's been 3 days and I haven't found any problems, however, this morning I found my phone to have no reception. I restarted it and it started working again.
Could this be a SIM card problem? WiFi works fine.
Thanks
Click to expand...
Click to collapse
Is it the same SIM card from both phones?
Something has to be the same between them, either the SIM, or if it is a different SIM, then your location / surroundings / interference

*Detection* said:
Is it the same SIM card from both phones?
Something has to be the same between them, either the SIM, or if it is a different SIM, then your location / surroundings / interference
Click to expand...
Click to collapse
Same SIM card. My location and surroundings don't affect when I lose reception. It just seems to be random. Both me and my girlfriend have the same carrier (Kodoo). I'd be sitting by my desk for a couple hours and have full bars and suddenly lose reception. Then restart my phone and I get reception back.

TastyBiscuit said:
Same SIM card. My location and surroundings don't affect when I lose reception. It just seems to be random. Both me and my girlfriend have the same carrier (Kodoo). I'd be sitting by my desk for a couple hours and have full bars and suddenly lose reception. Then restart my phone and I get reception back.
Click to expand...
Click to collapse
I'd request a SIM replacement, see if that fixes it, unlikely to be the phone if you have two with the same problem using the same SIM

A confusing problem with my phone's cellular network service.

Hey guys. I have an unusual problem with my phone.
I was using my phone one night while in bed, playing a game that requires online connection when suddenly, my phone slipped from my hands. I managed to save it from falling to the floor, but it hit the wooden frame of the bed in the process. I checked the phone out and noticed no problem with it. The screen was fine, nothing broken on the exterior. So I tried to go back to my game, but it complained that there was no internet connection. That was when I noticed the signal had disappeared and the phone displayed "No service". I tried turning airplane mode on and off........nothing, restarted the phone.........no change. I turned off the phone and went to sleep.
In the late hours of the morning, I switched it on, and was greeted with the "emergency calls only" warning. I tried removing and re-inserting the sim card, restarting the phone and when I tried everything I could think of, I did a factory reset on the phone. Still, nothing changed. So, to rule out the possibility that the service was at fault, I removed the sim and inserted it into my brother's phone. It worked as it should! I inserted my brother's sim into my phone, same thing. At times, I get "No service", at times, "Emergency calls only", even some times, I get "No sim card", when there's actually a working sim card in the phone. These led me to believe the phone isn't detecting sim cards, but sometimes, the phone recognizes my sim card and the signal shows up, but I'm unable to use mobile data connection, make or receive calls or texts, or even dial a code to check my airtime balance.
So I decided it was definitely the hardware that had developed a fault. But then, one day, I went to visit a friend quite far away from where I lived, and I took my phone with me. To my surprise, my phone worked flawlessly there. I was able to use data connection and was getting good speeds. I was able to call and text. I removed the sim and put in another sim and it was the same.........worked flawlessly. Now, I don't know what to think anymore because as soon as I got back home, I was again getting the No service/Emergency calls only warnings, and the same sims work in my brother's phone - my brother lives with me.
** I know (or think) it's not a software problem because it would have been resolved after I hard reset it. Plus, it all started when it hit the bed.
** I know it's not the service in my area because the sim works in my brother's phone and my brother stays with me.
** I can't decide if it's an hardware problem because sometimes it works, sometimes it doesn't.
Some facts about the phone (if it helps)
** The phone is rooted
** It uses a sim tray. The type that allows two micro-sims or one micro-sim and one sd-card.
** The phone gets hot when I use it extensively.
I'd appreciate any help. Thanks guys.

Same thing happend to my phone it would have a mind of its own but it turned out that out in an open field the phone works but if you get any kind of walls around your phone the network wod not work. This is caused by a hardwsre problem took it to the shop and git it fixed.

khalid2882 said:
Same thing happend to my phone it would have a mind of its own but it turned out that out in an open field the phone works but if you get any kind of walls around your phone the network wod not work. This is caused by a hardwsre problem took it to the shop and git it fixed.
Click to expand...
Click to collapse
Thanks for replying bro. I plan to take it out for repairs soon.

SIM not detected after dropping phone

Hello! I've had the ONO (A0001) for about 3 years and it has been more than adequate for my needs. It has had a few drops along the way, but nothing terrible. Was always kept in a Diztronic case with screen protector. Been running the Resurrection
Remix ROM (Android 7.1.1) very stable since the start of the year.
However, after its latest fall (it actually landed screen first!), I've noticed that my ONO has stopped recognizing the SIM altogether. I've tried reinserting the SIM card, network reset, rebooting, cleared the 'Phone' and 'SIM Toolkit' app caches, wiped cache in TWRP, but to no success. Interestingly, WiFi still works. Attempting to access 'Cellular Networks' from 'Wireless & Networks' to change 2G-3G-LTE returns "com.android.phone has stopped" at every attempt.
Has anyone every experienced this before and knows how to fix it? I have a sick feeling that this may be a hardware problem.

xFalcon1986 said:
Hello! I've had the ONO (A0001) for about 3 years and it has been more than adequate for my needs. It has had a few drops along the way, but nothing terrible. Was always kept in a Diztronic case with screen protector. Been running the Resurrection
Remix ROM (Android 7.1.1) very stable since the start of the year.
However, after its latest fall (it actually landed screen first!), I've noticed that my ONO has stopped recognizing the SIM altogether. I've tried reinserting the SIM card, network reset, rebooting, cleared the 'Phone' and 'SIM Toolkit' app caches, wiped cache in TWRP, but to no success. Interestingly, WiFi still works. Attempting to access 'Cellular Networks' from 'Wireless & Networks' to change 2G-3G-LTE returns "com.android.phone has stopped" at every attempt.
Has anyone every experienced this before and knows how to fix it? I have a sick feeling that this may be a hardware problem.
Click to expand...
Click to collapse
Disassemble the device and reattach network antenna.Follow tutorials on Youtube for DIYs'.

Mr.Ak said:
Disassemble the device and reattach network antenna.Follow tutorials on Youtube for DIYs'.
Click to expand...
Click to collapse
Thanks. Will try that.

check ur network antenna

Hi @xFalcon1986 I had a similar issue for about one year. This may or may not help but for what it's worth, here is my experience:
Only my home network sim card would reliably work. Recently, I was traveling and once again my roaming worked for a few minutes before the phone gave me the notification: sim not found. I decided that enough was enough - I needed to figure this out or get a new phone. When I removed the problematic sim and compared i to my old home network sim, I noticed that there was tiny bit of curvature on the card. Excited about the potential, I bent the sim that would go unrecognized within a few minutes. Turns out, the first time I bent it, the side I made concave was the wrong one. After the first failed attempt, I pulled the card out again and then bent it the other way. It didn't work either and hope was fading. Just to be sure, I bent the sim one more time - this time further than I thought healthy for the sim. Turns out those cards are quite flexible! Once I inserted the sim, the network connection returned and remained for at least 20 minutes. It then went unrecognized and so I bent it once again and everything continued working.
It turns out that I need to bend the sim card once per week but besides that, my phone once again recognizes the sim.
I have no idea if you went to another phone by now but give this bendy trick a shot. The metal contacts might just have been bent a bit too much one way or the other while the phone impacted the ground. Give it a try and let us know how it worked for you. Cheers!

Nitramwin said:
Hi @xFalcon1986 I had a similar issue for about one year. This may or may not help but for what it's worth, here is my experience:
Only my home network sim card would reliably work. Recently, I was traveling and once again my roaming worked for a few minutes before the phone gave me the notification: sim not found. I decided that enough was enough - I needed to figure this out or get a new phone. When I removed the problematic sim and compared i to my old home network sim, I noticed that there was tiny bit of curvature on the card. Excited about the potential, I bent the sim that would go unrecognized within a few minutes. Turns out, the first time I bent it, the side I made concave was the wrong one. After the first failed attempt, I pulled the card out again and then bent it the other way. It didn't work either and hope was fading. Just to be sure, I bent the sim one more time - this time further than I thought healthy for the sim. Turns out those cards are quite flexible! Once I inserted the sim, the network connection returned and remained for at least 20 minutes. It then went unrecognized and so I bent it once again and everything continued working.
It turns out that I need to bend the sim card once per week but besides that, my phone once again recognizes the sim.
I have no idea if you went to another phone by now but give this bendy trick a shot. The metal contacts might just have been bent a bit too much one way or the other while the phone impacted the ground. Give it a try and let us know how it worked for you. Cheers!
Click to expand...
Click to collapse
I have a similar problem. I wanted to activate the SIM. I didn't have access to the SIM card number for activation. So I removed it to read the number. When I put it back in I started getting "not found messages". Turns out something happened to the SIM card tray, and the card slid off the tray and was stuck inside the phone! I finally got it out by bumping the phone against my hand.
I went through e-Bay and located a replacement as the original appears damaged.
Is your Macgivered solution still working? Have you gone to another phone?
Sent from my OnePlus 5 using XDA Labs

I just tried it & surprisingly it worked for me. Thanx
It worked for me
Nitramwin said:
Hi @xFalcon1986 I had a similar issue for about one year. This may or may not help but for what it's worth, here is my experience:
Only my home network sim card would reliably work. Recently, I was traveling and once again my roaming worked for a few minutes before the phone gave me the notification: sim not found. I decided that enough was enough - I needed to figure this out or get a new phone. When I removed the problematic sim and compared i to my old home network sim, I noticed that there was tiny bit of curvature on the card. Excited about the potential, I bent the sim that would go unrecognized within a few minutes. Turns out, the first time I bent it, the side I made concave was the wrong one. After the first failed attempt, I pulled the card out again and then bent it the other way. It didn't work either and hope was fading. Just to be sure, I bent the sim one more time - this time further than I thought healthy for the sim. Turns out those cards are quite flexible! Once I inserted the sim, the network connection returned and remained for at least 20 minutes. It then went unrecognized and so I bent it once again and everything continued working.
It turns out that I need to bend the sim card once per week but besides that, my phone once again recognizes the sim.
I have no idea if you went to another phone by now but give this bendy trick a shot. The metal contacts might just have been bent a bit too much one way or the other while the phone impacted the ground. Give it a try and let us know how it worked for you. Cheers!
Click to expand...
Click to collapse

Pack Leader said:
I have a similar problem. I wanted to activate the SIM. I didn't have access to the SIM card number for activation. So I removed it to read the number. When I put it back in I started getting "not found messages". Turns out something happened to the SIM card tray, and the card slid off the tray and was stuck inside the phone! I finally got it out by bumping the phone against my hand.
I went through e-Bay and located a replacement as the original appears damaged.
Is your Macgivered solution still working? Have you gone to another phone?
Click to expand...
Click to collapse
Hi! Sorry for the late reply but yes the solution is working great. Because of it, I'm still making use of my OnePlus One! I found that after the second week of bending, the sim card held the shape for about three months before I needed to bend it again.
Funny thing is that I initially also had my sim stuck inside the phone for some reason and getting it out was a real pain. However, with the bendy trick the sim had been working and I've had no trouble removing it when necessary. Hope you were able to figure something out. ?