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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!

[Q] Can random re-boots be caused by a bad sim card?

Hi all,
I have my primary phone which is an international SGSII and I have my Infuse as my secondary phone.
I experienced random reboots on my SGSII which I couldnt seem to explain and I started using my Infuse for a while now and it has now started to randomly reboot which it only has started doing since I put my sim card in it and had NEVER done it with no sim card in it so... Can these issues be being caused by a bad sim card?
The card itself is a bit old...
Please advise...

Anything's possible i guess, if you didn't change anything else or install any software on both that might have caused i would assume it would be the sim card.
Try one or the other for a day without the sim card and the other with sim card and see what happens. Then switch and re-test.
Interested in knowing if it's the sim card or not, as a last resort you could just buy a new sim card from an AT&T store.

Bandit_Kaine said:
Anything's possible i guess, if you didn't change anything else or install any software on both that might have caused i would assume it would be the sim card.
Try one or the other for a day without the sim card and the other with sim card and see what happens. Then switch and re-test.
Interested in knowing if it's the sim card or not, as a last resort you could just buy a new sim card from an AT&T store.
Click to expand...
Click to collapse
Thanks for the response... I have switched out the cards again to see what is going to happen.
And just so you know... I'm in Canada on the Rogers network... not with AT&T...
Sent from my SAMSUNG-SGH-I997 using xda premium

yiannisthegreek said:
Thanks for the response... I have switched out the cards again to see what is going to happen.
And just so you know... I'm in Canada on the Rogers network... not with AT&T...
Sent from my SAMSUNG-SGH-I997 using xda premium
Click to expand...
Click to collapse
Very possible since Samsung has implemented (since the Galaxy Tab 7" i think) a little "feature" where it forces your phone to reboot when it cant see the SIM. Its possible that the SIM is loosing contact and forcing a reboot. Hard to be sure though.

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

sim card removed?

I'm in India right now on vacation. I own a rogers s2 lte. Recently I've been getting random popup messages saying my Sim card has been removed and i need to restart the phone. Thing is I did remove the Sim card for a minute or so a few days ago but I'm still on the same rogers Sim card and the phone is in flight mode the entire time. Its annoying for this to happen. Any ideas?

It could be a ROM or radio issue. Could also be a sim card slot issue, bent or broken pins etc.

Wish I could help, but you need to give more info. Are you running stock or a rom? Have you dropped it recently? It could be software or hardware, but nobody can help you if you don't give any info.
Sent from my SAMSUNG-SGH-I727 using xda premium

Reported
Sent from my SGH-I727 using xda premium

[Q] Not Recognising Sim Card, Any FIx?

Hi All
I have a Galaxy Tab 2 7" Model GT-P3100 I have not used it very much as I mostly use my S3. I bought it from Hong Kong, when it was tested in the shop in HK there was no issue with anything, all worked fine. I have since brought it back to England, mostly used it on wi-fi at home, then recently I decided to get a sim card to put in it to use it out and about.
When I put the sim card in, it comes up with a message box "SIM card added - Restart your device to access the mobile network - Restart" so I click restart and wait for the reload. But it doesn't recognise the sim card and still has "No SIM - Insert SIM card" within the notifications box as ongoing.
Now if I remove the sim card from the device while it is still on, it comes with a message box "SIM card removed - The mobile network will be unavailable until you restart with a valid SIM card inserted - Restart"
This sim card I am using has been tested in other phones and it works no problem, it is a pay monthly contract with Orange. I have also tried other SIM cards in this device and have the same response from every one.
So after doing some reading online and on this forum, I rooted the Tab and then used GalaxSim Unlock to unlock the phone, thinking it may be becasue I bought it in Hong Kong, the Tab is now unlocked but still shows the symptoms above.
Is there anything else I can do to get it to recognise the SIM or do I need to unroot it and send it back to Samsung?
Any help is gratefully received.

Al Boydino said:
Hi All
I have a Galaxy Tab 2 7" Model GT-P3100 I have not used it very much as I mostly use my S3. I bought it from Hong Kong, when it was tested in the shop in HK there was no issue with anything, all worked fine. I have since brought it back to England, mostly used it on wi-fi at home, then recently I decided to get a sim card to put in it to use it out and about.
When I put the sim card in, it comes up with a message box "SIM card added - Restart your device to access the mobile network - Restart" so I click restart and wait for the reload. But it doesn't recognise the sim card and still has "No SIM - Insert SIM card" within the notifications box as ongoing.
Now if I remove the sim card from the device while it is still on, it comes with a message box "SIM card removed - The mobile network will be unavailable until you restart with a valid SIM card inserted - Restart"
This sim card I am using has been tested in other phones and it works no problem, it is a pay monthly contract with Orange. I have also tried other SIM cards in this device and have the same response from every one.
So after doing some reading online and on this forum, I rooted the Tab and then used GalaxSim Unlock to unlock the phone, thinking it may be becasue I bought it in Hong Kong, the Tab is now unlocked but still shows the symptoms above.
Is there anything else I can do to get it to recognise the SIM or do I need to unroot it and send it back to Samsung?
Any help is gratefully received.
Click to expand...
Click to collapse
flash a custom rom ( stable is cm10.1.2) or a customised stock rom.I thinks it will fix your prob

It is not a ROM related problem.
Go to your network operator and have your old sim card replaced with the new one (with the same number if you want). Sometimes, an old sim card just don't work with newer service. G' luck..
Sent from my GT-P3100 using Tapatalk HD

lexobys said:
It is not a ROM related problem.
Go to your network operator and have your old sim card replaced with the new one (with the same number if you want). Sometimes, an old sim card just don't work with newer service. G' luck..
Sent from my GT-P3100 using Tapatalk HD
Click to expand...
Click to collapse
Thanks to you both, the sim card is new, only 2 months old. I have just flashed CM10.1.2 and not only does it not recognise the sim card, I also can't do anything as the android keyboard crashes all the time.
I am going to try to reboot with the latest nightly to see if that helps.

I am now running the latest CM 10.2 from 21.8
The SIM is still not recognised and now my PC is not recognising the Tab either.
When I first plugged it in it came up with installing drivers for Google Galaxy Nexus?? Is this normal

Hi this is the same problem I have on mine,I am starting to think it is the card reader that is the problem ? which wont be a easy job to replace for me

Might be hardware problem
use triangle away to wipe binary on downloadmode then install a stock rom and contact service center to repair it under warranty (if your device have warranty)

Just flash a different modem
Sent from my GT-N7100 using XDA Premium 4 mobile app