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[Q] On my third N1 and still faulty - can't see SIM card

I am now on my third N1 after RMA'ing the first because of pink tinge camera issues and poor wireless performance. The second worked fine for a bit and then began to randomly reboot and lose the network. Often after rebooting it would go into a loop which only a battery removal would fix.
The third unit worke for about 10 minutes and after I managed to get it back to the state I wanted, it lost the SIM card displaying a no SIM card error message. I tried the SIM in other phones and it was fine (T-Mobile SIM) and other working SIMS were not recognised in the phone.
So yet another call to HTC and a request a replacement. I am flying close to the wind here since my warranty expires Jan 7 and there's no guarantee that the next RMA process will be complete by then.
Out of interest, in case it's just a simple SIM contact issue, how does one clean the contacts on the SIM holder in the phone?

if your restoring a back up or an app that could be the issue or a corrupted SD card.

How old is your SIM card? I am not 100% sure but for TMO in NY I had to replace my SIM when I went to a different Sony Ericsson phone, before I got the Xperia. After that my phones worked no problem.
But like the other member mentioned, you could be loading a corrupt system backup. I had a SD card cannot be read because of a bad build.prop I had installed.

It turned out to be a bit less complex than that. The sim was not sitting properly on the contacts but once I jammed a piece of paper on top of it to make it contact better, the phone recognized it. Not sure it this is a good long term solution or should I continue with the RMA process.

Well it's not perfect, but it works, so depends on how much you want the hassle.

Please help, No Sim Card/Emergency Calls only

Any advice would be greatly appreciated. I have searched and could not find an answer to my issue. I purchased a T-mobile variant Galaxy S6 it was stuck on the Samsung logo but I only paid $100 so I figured worst case scenario sell it for parts. I managed to get it to boot everything works except cellular service. If I remove the Sim it says "Sim Card Removed" Restart. After restart it goes immediately to No Sim Card . I insert the Sim and it says "Sim card Detected" Restart. After Restart No Sim Card???? Checked IMEI its clean, flashed stock via Odin, pulled what little hair I had left out. Any words of wisdom? Thank you in advance for your time. forgot to add no mobile networks option at all in settings?

Does the SIM card work in another phone?

yes sim card works in other phones

Could be why you paid $100 for it. If your SIM works in another phone then there is a issue with the S6 being able to read your SIM. Have a friend with T-MOBILE? Try their SIM card. You might have a picky SIM.

of coarse it's why I paid a $100 for it, no matter what I can get my money back out of it but I was hoping to be able to fix it. Tried several sim cards same thing it recognizes the card restarts no sim card. I was thinking it might be the sim card reader itself but the fact that there's no Mobile networks in settings makes me think it's software related? Oh well I guess parts on ebay here I come. Anyone need a new display LoL

Same issue
Hi there. I have exactly the same issue with an O2 unlocked S6. I used my Ee sim on it till two weeks ago when suddenly i lost all network capacity (same as you). Previously i flashed an unbranded stock firmware in order to get rid of the o2 logo (may seem stupid but that was what i did). After 2 weeks of normal use with the new rom suddenaly i couldn't give/receive calls /texts. Since, i tried wiping, flashing, advanced wiping etc but same issue. Any advice is more than appreciated.

SIM-error and hangups

I recently purchased Nexus 6 and since it uses nano-sim, I used a sim-card cutter to make my micro-sim a nano sim. Worked fine for a while but then all of a sudden I started getting messages about no sim card. Reboot always fixes the issue, but this happens like 30 times a day, so rebooting the phone that often doesn't seem like a good idea. The phone also freezes all the time, no matter what I do, and then at other times it works like a wonder. I've had a Nexus 6 phone before (this is my 2nd) and it had the same issue. Apparently nothing was wrong with it.
Is the SIM-card causing these freezes, or is this a part of the world-wide issue that has been reported recently in the media? No other phone has had issues with my SIM-card, even though I used the cutter to make it nano. So I doubt it's a faulty sim-card. I've tried LG G4, Xperia z3+ and others and they've not had any issues with the cut sim.
edit
I've noticed the freezing happens most when I've recently charged the phone. Last night I left the phone on charger and when I woke up, the phone had switched itself off.
edit2
I've tried resetting the phone, also hard reset. Didn't help.

A method to check if your cutted sim card is damaged or not is to remove the sim card and replace it with a working sim card of another phone.

NLBeev said:
A method to check if your cutted sim card is damaged or not is to remove the sim card and replace it with a working sim card of another phone.
Click to expand...
Click to collapse
^^That^^
It happened to the wifey, and swapping with my SIM confirmed it.

poodleDoo said:
^^That^^
It happened to the wifey, and swapping with my SIM confirmed it.
Click to expand...
Click to collapse
Yep. I switched the sim and works fine now.

nokia 8 suddenly wont recognise sim card

Hello all,
My wife's Nokia 8 suddenly won't recognise it's SIM card
I have done the following
Tried sim in another phone - works fine
Hard reset the phone, no change (used ADB recovery)
Not sure what else I can do?
I cannot select anything on mobile network as it is blanked out,
Thanks

hr21 said:
Hello all,
My wife's Nokia 8 suddenly won't recognise it's SIM card
I have done the following
Tried sim in another phone - works fine
Hard reset the phone, no change (used ADB recovery)
Not sure what else I can do?
I cannot select anything on mobile network as it is blanked out,
Thanks
Click to expand...
Click to collapse
I think there is only one way... Rtm
Powered by Nokia 8

I had a similar problem, after first update in android 7.whatever my sim card worked but couldnt go online, just via wifi. I could make calls and recieve texts. I got a new simcard and that helped. Later Oreo came and my phone glitched out when i had the simcard installed. But when i took it out it worked. Sent it to nokia support center and got it back today, what happend? Yes the phone works, i can make and recieve calls/texts. But i cant go online without wifi. Asked my provider for a new sim card now, will return and write if that works.

and I have this problem. Have you found a solution?

Weird, my TA-1052 suddenly got this problem yesterday, SIM card state keep looping between detected and undetected, after several loops phone will reboot and reboot again and again.
But when I switch the card to the other slot and reboot, all things seem to be fine. Then at some random time of the day this problem shows up again and I have to switch the card back.
I can 100% reproduce this bug by insert 2 SIM cards together, phone will stuck in a loop and reboot, but logcat shows nothing suspicious.
Tried factory reset but nothing happened.
Since both SIM card slots actually work and I haven't updated system recently, I guess this shouldn't be hardware-related.

My G6 Shows 'Corrupt SD Card' Error but Fails to Format it

My G6 says that my SD card is corrupted, so when I go to format it the percentage completed immediately shows 20% then, after about 10 seconds, the formatting screen closes before it completes the format, and the whole time it shows that it's formatting it is always at 20%. Then my G6 acts as though there isn't an SD card in the phone, it only shows up again after I power cycle the phone. I have tested multiple MicroSD cards on this G6 and the same thing happens for every single one I tested, but I happen to have (limited) access to my mom's G6 and when I tested the same cards on her phone it says the SD card is corrupted, but successfully formats it and mounts it.
The MicroSD card that I would like to use with my phone is a 200gb SanDisk card.
Thanks in advance.
Update 7/2/2018

Hey, Can it be read/formatted in a computer with your sd adapter like a flash drive? if it can try reformatting it there then see if your device can recognize it. if it can't or it says corrupt / needs to be formatted and craps out... it's your SD card. it is the same one I had (probably..with red lettering on it?) That's the bad news, the good news is you can still go online and register it with SanDisk and they will send you a new one for free (cost of shipping to them the corrupt one, you have to pay.) But they will send a replacement, I think it took about 2 weeks to get one back.
Take care.

MoodSwinger said:
Hey, Can it be read/formatted in a computer with your sd adapter like a flash drive? if it can try reformatting it there then see if your device can recognize it. if it can't or it says corrupt / needs to be formatted and craps out... it's your SD card. it is the same one I had (probably..with red lettering on it?) That's the bad news, the good news is you can still go online and register it with SanDisk and they will send you a new one for free (cost of shipping to them the corrupt one, you have to pay.) But they will send a replacement, I think it took about 2 weeks to get one back.
Take care.
Click to expand...
Click to collapse
I can plug it into a computer and format it successfully, it works in literally every other device that I've tested it in, including my mom's G6. That's why I have a feeling that the problem is being caused by some sort of issue with my G6. I have tried factory resetting my G6 two times already and it failed to fix the issue. I want to root my phone, but my software version is H87211h, and the method mentioned here has (as far as I know) only been tested on devices running H87211g.

Hello there. I have same problem with my LG G6, It shows every SD Card as corrupt and tap to fix. when i try to fix and format it get stuck on 20% its been more then two months and i am unable to use the memory card on it..
There is nothing wrong with Memory cards , it is the problem with the LG G6 either it is software issue or may be due to the fact that i have changed the Sim Tray as my sim tray was broken... The Network sim card work fine only problem is the Sd Card.... If any one have the sim issue or any solution .. Please share.. Thanks

zahid046 said:
Hello there. I have same problem with my LG G6, It shows every SD Card as corrupt and tap to fix. when i try to fix and format it get stuck on 20% its been more then two months and i am unable to use the memory card on it..
There is nothing wrong with Memory cards , it is the problem with the LG G6 either it is software issue or may be due to the fact that i have changed the Sim Tray as my sim tray was broken... The Network sim card work fine only problem is the Sd Card.... If any one have the sim issue or any solution .. Please share.. Thanks
Click to expand...
Click to collapse
Same thing happened to me, my SIM Tray broke and I bought a replacement from Amazon and that's when the issue appeared.

I updated my G6 to Oreo and now it shows what command is causing the formatting app to crash. I've attached a screenshot.

OK, so with the new info (sd tray breaking) I think what happens is when the SD tray is breaking, it's getting caught up on the little pins inside that contact the SD card and bending them a bit, and then that pin or pins are screwed up so it can't read the SD, and because it detects that there is one in there, begins to format and go thru the sectors when it gets to the messed up pin it craps out because it's not reading anything so it's saying the card is corrupt at that point. You have to send it into LG for a warranty repair. I had to do this too. go on the website, register your device, tell them the SD tray broke inside and it won't read the SD card or the SIM, and you will get a repair number within 24 hrs or so. Send in the device and you will get it back about a week turnaround time.
Good luck.

Most every time I've had this issue has been after an update or switching ROMs or kernel update and usually the issue is the kernel.
So basically speaking if you have an SD card corruption after any of these particular events reflash your kernel first.

I just bought a new Samsung 256GB microSD. I copied everything from my old card onto my PC, then onto my new card, and then put the new card in my phone. Android says it's corrupt and needs formatted. I try to format it and it always gives an error saying the command failed. Put the card back in my PC (which now can't use the card either) and performed a format (without the Fast option). Android still says it's corrupt and always fails to format it. So I put my old card back in the phone, and now it says it's corrupt too...
I had noticed that when I first opened the tray door it was being janky and wouldn't come out but a half inch. After reading this and getting the error for my old card too I decided to take the tray all the way out. Wasn't easy getting it out and now it's broken. Or already was broken. I tried cutting off the broken part and put the tray back, but now it won't even see a card or my SIM. So I've ordered a new tray. Hopefully that will solve everything... Unless my pins are jacked up as suggested earlier....

Well, got a new sim tray, and now it can read the SIM fine, but every SD card still says corrupt, and it fails to format it each time.
Out of warranty -- I bet the repairs cost half what I paid for the phone (like $200, crazy sale, two years ago). Sigh.
Any other thoughts on this?

The same problem with my lg g6 dual , did you have solution ?

Thanks to everyone pointing out that broken tray that damages the pin's issue. Seems that exactly what happened to the phone I gave my mom. Little to no chance here in South Africa that we could get it repaired for any reasonable price. At least this thread stopped me hunting around for a solution to the "keeps-formatting" but not working issue. Bit of a waste that I bought a new memory card, but not the end of the world. Wasting a few hours on a lost cause is much worst.

So glad I found this...
Unfortunately I already bought a new tray to replace the broken one, but now at least I know not to spend hours and hours on an issue I couldn't possible fix myself...