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[Q] Phone won't connect to network. Sim card works

Hey guys.
I was running on the stock deodexed 2.3.3 GB rom and out of nowhere my phone freezes. I disconnect the battery and start it up but now it won't register on the network
It says "searching" on the lockscreen and I have the no signal symbol at the top.
I try to go to my network setting but it says "insert sim card to access network services"
WTF?
The sim card works in all my other phones.
I've reflashed the phone with 2.2, 2.3.4, and 2.3.3 again but nothing
I've even odin'd a couple of modems. Nothing. How is this possible?
Can someone lead me in the right direction to fixing this?
Cheers and thanks!

I'm assuming you're still on t-mobile right?
if you want to stay on a stock rom, it'll be fine for you to follow the GB Starter Pack guide I wrote. The link is in my forum signature.

Check your imei in settings. May be corrupted.
Sent from my SGH-T959V using Tapatalk

Im having the same issue did everything according to key on this link
http://androidadvices.com/how-to-update-samsung-galaxy-s-4g-to-gingerbread-2-3-3-firmware/
Worked perfectly no problems but when i load up the phone No Cell Service. Am i missing something?

If you are using an unlocked phone there is a good chance that you will need to insert your apn's manually using APN Manager from the market.

Check and see if you have an updated sim card. remove the sim card and look at the side with the gold contacts. You should see numbers printed on that side. If you have numbers then you have the new Sim card. If not you have a old Sim card that could cause issues. t mobile will update your card for free if you have an old one. Just bring it to the store.
Sent from my SGH-T959V using xda premium

Or like Samoira said check your emie on settings.about phone.Status..check if you have regular numbers or garbage characters!
Sent from my SGH-T959V using XDA App

Hey guys. I found the issue and thought I'd share. Somehow the sim reader got gummed up so I sprayed some electronics cleaner in it and worked excellent.
If anyone ever has this problem just head to your local hobby store and spray it!

Hello, I purchased a galaxy tab 7 plus in Hong Kong. All work great until 2 days ago,

Hello, I purchased a galaxy tab 7 plus in Hong Kong. All work great until 2 days ago, I inserted another Sim card then it now says no Sim card. I tried with several other Sim cards but no luck, I did a factory reset, flashed with firmware from Sam mobile but still no luck, I don't know what else to do before I send it to Samsung for repair that gonna be expensive, help is greatly wanted, thank you.
Sent from my GT-I9100 using XDA

Try to insert the sim card with the tablet on. Does it restart? If not are you sure you are inserting it with the correct side?

Hello, thanks for the answer, I tried all that already, anyway the Sim only fit in one position so you cannot take wrong.
The tab restarts when inserting card yes.
I tried also taking the battery out for 10 mins... Clean the head of the Sim compartment but no luck.
Sent from my GT-I9100 using XDA

You took the battery out? how did you do it?
P_

sim card
pakalrtb said:
You took the battery out? how did you do it?
P_
Click to expand...
Click to collapse
Just removed the back by pushing under the sd card slot then inserted a flat tool to unclip the lid, then removed the batery connector.
However i still have the issue, its driving me crazy as it is my working tool...

does the original SIM still work in it?
perhaps try flashing original & latest frimware updates for new/different modem.
I know one chinese version of tab plus has locked bootloaded dud to China's restrictions, I would not be surprised if they have locked down modem as well.
And for the heck of it you could always try Galaxy S Unlock app, to be certain you're unlocked.
Strongly suggest backing up /EFS folder (twice) just in case.

Thanks for the suggestion, I flashed the device twice already but there is only one file. Could you direct me to the files you are referring to please I'll take a look when I'm back home, thanks again.
Sent from my GT-I9100 using XDA

I would try EVERYTHING else before flashing a new modem. Toggle airplane mode. disable/enable packet data, etc.
First, does the original SIM still work?
If so I would give the Galaxy S Unlock a shot for the heck of it.
These other SIMs have you tried them in other devices to either make sure they work or activate them?
did you purchase device on a SIM contract??

sim issue
The original sim does work, i have put it in other phones and it works fine, i have also tried other sim but still same issue, message still say "please insert sim card"
I have purchased the tab sim free in hk so no, no contract, it did work fine since december until 2 days ago where i input a data only sim card, when i insert sim card it does reboot, meaning it detects the card in the socket but thats it.
Concerning Galaxy S Unlock my tab is not rooted i have used only legit firmware until now so im not sure about that.
PS: looking at my phone servie status it says:
Service State: Out of service

Are you sure you havent been sold a bad or expired sim card?
Id try to give samsung customer support a call at least, they will probably tell you to send it to them anyway.
Can you try exchanging this for another one where you puchased it?

Well, i bought it during my holidays in hk but i live in norway, so... bit difficult to chage it, the sim card works just fine in other devices so it should work in tab.
I tried the galaxy s unlock and during step 1 it says error for efs backup, so either because im not rooted or because my efs is corrupted.

Probably because youre not rooted.
Im wondering if the SIM could be from a small provider which isnt recognized by the device?
It should at least dected then say something like network provider unrecognized, etc.
I really dont what to say.
I would keep trying other sims, try to get a 5$ pre pay from a major carrier like O2, 3, tmobile, etc. not sure what carriers you have over there.

Well i use Telenor which is the biggest and also quite big in europe, i will call customer service tomorrow and hear what they say, but i fear its gonna rip my pockets...

richardfv said:
Well i use Telenor which is the biggest and also quite big in europe, i will call customer service tomorrow and hear what they say, but i fear its gonna rip my pockets...
Click to expand...
Click to collapse
did you push the simcard all the way to the bottom of the slot?
I need a pen to push it....so I wonder if you insert your sim card properly.

dannyyung said:
did you push the simcard all the way to the bottom of the slot?
I need a pen to push it....so I wonder if you insert your sim card properly.
Click to expand...
Click to collapse
yes, since the first time, repair shop said they cannot help since device has been purchased in hong kong...
No solutions until today...

Solved
After dismantling the tab completely (hard work guys...) i confirm that the sim card reader is defect, the cushions that reads the card did not press completely on it so i applied a temporary fix by adding an extra layer to thicken the card so it can press correctly on the cushions. I did try this fix before with the tablet in one piece, however i could not get it to work correctly.
Anyway thanks for your help and i'm happy that i can use it again

[q] no sim issue

Having a huge issue here need some help, I recently finally got my unlock code from ATT and was very happy, I applied my unlock code with a SIM I had at work and all was good, I will be traveling out of country and had an Ekit SIM decided to test with the phone, it worked fine, then I went to put in my ATT SIM (i had it cut for microsim size, so I`m using adapter, but never had issues) and now I get the little no SIM sign and no service, interesting part is that the signal bars seemed to go up maybe just cosmetic...
I was on the ICS and then went back to SkyICS which is 2.3.5 but my modem statyed on UCLA4, I found the older 3 modem and now it shows no bars but still SIM is not working, I tried multiple SIM cards and always show the SIM symbols and when I go to mobile networks it says SIM is not present. Please help me as this is my primary phone and Im stuck, I really wouldnt like to reset everything.

If it was me I'd make a nandroid backup, then ODIN flash the Samsung official stock I727 UCKJ2 2.3.5 firmware from sammobile here. After flashing stock, booted into stock e3 recovery and do a wipe data/factory reset and see if that resolves the 'no sim' issue. If the phone still doesn't recognize the AT&T sim, take it into an AT&T store and request a new sim card. If it's still borked even with a new sim card they should swap it under warranty.

cschmitt said:
If it was me I'd make a nandroid backup, then ODIN flash the Samsung official stock I727 UCKJ2 2.3.5 firmware from sammobile here. After flashing stock, booted into stock e3 recovery and do a wipe data/factory reset and see if that resolves the 'no sim' issue. If the phone still doesn't recognize the AT&T sim, take it into an AT&T store and request a new sim card. If it's still borked even with a new sim card they should swap it under warranty.
Click to expand...
Click to collapse
I guess I have to try to go to Stock, no choice here, I know its not the SIM tried in wifes phone and its fine, also that EKit SIM that just worked in the phone does not, could I some how damaged the SIM card holder ?

Sounds like it could be the sim slot. Anyway, if you put it back to stock you'll have not issues at the store when you swap it. Then restore your nandroid backup on the new phone.

cschmitt said:
Sounds like it could be the sim slot. Anyway, if you put it back to stock you'll have not issues at the store when you swap it. Then restore your nandroid backup on the new phone.
Click to expand...
Click to collapse
Only thing is I bought this phone on ebay back in January, its registered under my account and everything, and I got it brand new. I hope ATT will repair/replace under warranty. Sad thing is I was fighting with ATT for 2 weeks to get this phone unlocked and finally got it now I have to swap it and go thru the same process .
I dont get how this happened, this is not the first time I swap SIMs and all was good, I think its pretty hard to break a SIM slot, but I guess I did it some how. So Pissed off right now its not even funny

Just as a long shot, maybe try cleaning the sim card contacts with a pink pencil eraser. Sounds crazy, but I have a Garmin running watch and the contacts on the back sometimes get dirty and it won't sync with my PC, so I just 'erase' them a bit and it's back in action.
If AT&T won't do the warranty swap, Samsung will directly-- although that's a little more of a hassle. Good luck!

cschmitt said:
Just as a long shot, maybe try cleaning the sim card contacts with a pink pencil eraser. Sounds crazy, but I have a Garmin running watch and the contacts on the back sometimes get dirty and it won't sync with my PC, so I just 'erase' them a bit and it's back in action.
If AT&T won't do the warranty swap, Samsung will directly-- although that's a little more of a hassle. Good luck!
Click to expand...
Click to collapse
hmm you mean the SIM card it self right ? not the slot as the slot is covered ....

yozh said:
hmm you mean the SIM card it self right ? not the slot as the slot is covered ....
Click to expand...
Click to collapse
The card and the slot contacts, if you can get at them.
Also, you said the card is cut and in an adapter - maybe it's just not quite lining up with the slot pins. Try it with the card not quite fully pushed into the slot.

cschmitt said:
The card and the slot contacts, if you can get at them.
Also, you said the card is cut and in an adapter - maybe it's just not quite lining up with the slot pins. Try it with the card not quite fully pushed into the slot.
Click to expand...
Click to collapse
I just tried with every SIM I had including the same SIM that I was testing with and it was working, that one is not cut and is a full SIM and still no go, just the SIM symbol and NO SERVICE

yozh said:
I just tried with every SIM I had including the same SIM that I was testing with and it was working, that one is not cut and is a full SIM and still no go, just the SIM symbol and NO SERVICE
Click to expand...
Click to collapse
I cant even backup current ROM, it gets to somewhere on the data part and trows me back to recovery, been doing this for the last hour, getting really frustrated and tired !

Maybe it's time to punt and flash stock 2.3.5 with factory reset.

cschmitt said:
Maybe it's time to punt and flash stock 2.3.5 with factory reset.
Click to expand...
Click to collapse
Yep was able to backup and flash stock from here http://forum.xda-developers.com/showthread.php?t=1342348. still same no sim, I cleaned the SIM and the slot, even tried with some compressed air nothing all the same... I guess I`ll go to ATT store, do they usually replace phones on the spot ? I`m used to going to apple store where they just replace it... This really sucks !

I don't know if this will help, but have you tried manually inputting the APN for whatever carrier SIM you have at the moment? It's worth a shot
Edit: and are they LTE SIMS?
Sent from my SGH-I727R using xda premium

denenatse said:
I don't know if this will help, but have you tried manually inputting the APN for whatever carrier SIM you have at the moment? It's worth a shot
Sent from my SGH-I727R using xda premium
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Click to collapse
I would do that, but when I go to mobile networks I can't get to setting, it's says Insert sim to change mobile network settings.
The SIMs worked fine before yesterday. 1 is ATT lte 1 is not, but again it says no sim inserted.

Baseband says kj2?
Sent from my SAMSUNG-SGH-I727 using Tapatalk 2

Ok went to ATT store, they sent me to att service center, got a new phone. Now the unlocking chase begings again!
Sent from my SAMSUNG-SGH-I727 using XDA

Sim Won't Read

I've got a Telus Htc One X that's been rooted, bootloader unlock and s-off'd. I installed CM 10.1 on it and it ran fine for about a week and then it quit picking up the sim card.
I've tried factory resets on both CM 10.1 and stock rooted Telus sense rom with no luck along with the acclaimed tape on the back of the sim card trick. I have also tried two other sim cards and taken the backing off the phone to give the sim holder contacts a shot of cleaner.
Warranty is out of the question, anyone have any ideas?

Seems to me like you've tried everything short of replacing the sim card tray.

gullygossner said:
I've got a Telus Htc One X that's been rooted, bootloader unlock and s-off'd. I installed CM 10.1 on it and it ran fine for about a week and then it quit picking up the sim card.
I've tried factory resets on both CM 10.1 and stock rooted Telus sense rom with no luck along with the acclaimed tape on the back of the sim card trick. I have also tried two other sim cards and taken the backing off the phone to give the sim holder contacts a shot of cleaner.
Warranty is out of the question, anyone have any ideas?
Click to expand...
Click to collapse
My buddy had same issue he put a piece of heavy paper behind SIM and its worked great ever since
Sent from my HTC One X using xda app-developers app

exad said:
Seems to me like you've tried everything short of replacing the sim card tray.
Click to expand...
Click to collapse
I think that's where the problem may lie. I cannot find any info on replacing the sim card holder although they are readily available on Ebay.
The thick paper won't work, with the phone apart I can apply pressure to the backside of the sim holder and it does not remedy the problem.

gullygossner said:
I think that's where the problem may lie. I cannot find any info on replacing the sim card holder although they are readily available on Ebay.
The thick paper won't work, with the phone apart I can apply pressure to the backside of the sim holder and it does not remedy the problem.
Click to expand...
Click to collapse
Was worth a shot. But if your manually holding it on place I doubt replacing the tray would help
Sent from my HTC One X using xda app-developers app

Help please... Device not detecting Sim 1.

Today I wanted to insert a data sim in first slot but it was not going down. Thinking that there the sim is old. So I went to provider office and bought a new data sim. I inserted the sim without any obstruction but the device is not detecting the sim. I found that there are scratches on one lower end of sim terminals but there are no signs of scratches on the other end. Meaning that the device terminals are not attaching the sim terminals.
Any help would be much appreciated. I can't approach even the service center even if it is present.
Sent from my Coolpad 9976A using Tapatalk

mirchichamu said:
Today I wanted to insert a data sim in first slot but it was not going down. Thinking that there the sim is old. So I went to provider office and bought a new data sim. I inserted the sim without any obstruction but the device is not detecting the sim. I found that there are scratches on one lower end of sim terminals but there are no signs of scratches on the other end. Meaning that the device terminals are not attaching the sim terminals.
Any help would be much appreciated. I can't approach even the service center even if it is present.
Sent from my Coolpad 9976A using Tapatalk
Click to expand...
Click to collapse
I think you should trace the problem and go step by step here.
Since you are using the 1st slot then I am assuming you have a micro sim here.
A good first move would be inserting your friend's sim in the phone. If the sim works, then it could be possible that your sim got damaged for some reason.
If both are still not working, then you need to check for the carrier.
Maybe the phone is not fully unlocked, which means it will not work with some carriers.
Hope that helps

Nid_85 said:
I think you should trace the problem and go step by step here.
Since you are using the 1st slot then I am assuming you have a micro sim here.
A good first move would be inserting your friend's sim in the phone. If the sim works, then it could be possible that your sim got damaged for some reason.
If both are still not working, then you need to check for the carrier.
Maybe the phone is not fully unlocked, which means it will not work with some carriers.
Hope that helps
Click to expand...
Click to collapse
Thanks for coming for help.
The sim is working fine in another phone.
Secondly the same phone was having good data connection with the same carrier.
I think there is a problem in the terminals inside the slot. It has dislodged??
Sent from my Coolpad 9976A using Tapatalk

So, how did it go? Did you verify that the pins was messed up or what happened? (I have a ulefone be pro with the exact same issue)

mirchichamu said:
Today I wanted to insert a data sim in first slot but it was not going down. Thinking that there the sim is old. So I went to provider office and bought a new data sim. I inserted the sim without any obstruction but the device is not detecting the sim. I found that there are scratches on one lower end of sim terminals but there are no signs of scratches on the other end. Meaning that the device terminals are not attaching the sim terminals.
Any help would be much appreciated. I can't approach even the service center even if it is present.
Sent from my Coolpad 9976A using Tapatalk
Click to expand...
Click to collapse
man WHAT THE HELL you've DONE with this phone .. !!! you been messing / speculating with it like little kid with toy until destroyed..
First you knackered SIM 2 now SIM 1 .. you can throw phone in bin ..

Simona Simmy said:
man WHAT THE HELL you've DONE with this phone .. !!! you been messing / speculating with it like little kid with toy until destroyed..
First you knackered SIM 2 now SIM 1 .. you can throw phone in bin ..
Click to expand...
Click to collapse
What you are talking about? This was posted before the other post you have seen. I am the best keeper of any phone. But this was very unfortunate. I was inserting sim into the sim one tray. It was not going. So I left it. It was an old sim which was cut. I didn't use much force. Then I went and got a new sim and tried again. It went but was no more detected. I took it to the shop, from where I bought it. They sent it to Huawei center. They returned the phone saying that the inside terminals have broken. You have to pay 400 dollars. I refused to pay as I am not insane to do that.
It means that it is very delicate inside. Broken with a mild force.
Now I am using it with sim 2 only.
Sent from my HUAWEI MT7-TL10 using Tapatalk

mirchichamu said:
What you are talking about? This was posted before the other post you have seen. I am the best keeper of any phone. But this was very unfortunate. I was inserting sim into the sim one tray. It was not going. So I left it. It was an old sim which was cut. I didn't use much force. Then I went and got a new sim and tried again. It went but was no more detected. I took it to the shop, from where I bought it. They sent it to Huawei center. They returned the phone saying that the inside terminals have broken. You have to pay 400 dollars. I refused to pay as I am not insane to do that.
It means that it is very delicate inside. Broken with a mild force.
Now I am using it with sim 2 only.
Sent from my HUAWEI MT7-TL10 using Tapatalk
Click to expand...
Click to collapse
doesn't look like you best keeper.. SIMs contacts destroyed..
i mean you messing with phone.. leave it don't speculate with it when you don't know what you doing..
and 400 bucks? I wud fkin slap those ppl where you sent it to.. they tried piss you over.. rip you off