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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...
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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...
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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.
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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] Infuse only works with one sim [HELP]

Hi, I'm trying to sell/trade my old Infuse. I wanted to make sure everything was going good with it before I let it go so I tried a different sim card than the one I had in it and for some reason the no sim cards except the one I already had in it will work. I've tried just about everything to get it to work with other sims. I think i've tried every different version of sim card their is today most of them were the same exact version sim I've used in it for the past 6 months or so, yet only that one works in it. Has anyone ever had this problem? Does anyone have any solutions?

iiApotheosis said:
Hi, I'm trying to sell/trade my old Infuse. I wanted to make sure everything was going good with it before I let it go so I tried a different sim card than the one I had in it and for some reason the no sim cards except the one I already had in it will work. I've tried just about everything to get it to work with other sims. I think i've tried every different version of sim card their is today most of them were the same exact version sim I've used in it for the past 6 months or so, yet only that one works in it. Has anyone ever had this problem? Does anyone have any solutions?
Click to expand...
Click to collapse
your carrier probably has to clear the IMEI on the phone or re associated to that sim card...? Carrier specific ?? example I keep the same sim card, but use it on another phone...sometimes I have to get ATT to clear that phones info to put it to my sim card....
Your phone's IMEI (International Mobile Equipment Identity) number is an international "Serial number" for your phone to properly identify it.

iiApotheosis said:
Hi, I'm trying to sell/trade my old Infuse. I wanted to make sure everything was going good with it before I let it go so I tried a different sim card than the one I had in it and for some reason the no sim cards except the one I already had in it will work. I've tried just about everything to get it to work with other sims. I think i've tried every different version of sim card their is today most of them were the same exact version sim I've used in it for the past 6 months or so, yet only that one works in it. Has anyone ever had this problem? Does anyone have any solutions?
Click to expand...
Click to collapse
Were the other SIMs from other carriers?

Entropy512 said:
Were the other SIMs from other carriers?
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Thank you, sir for taking time to help answer questions/provide solutions. As to us that are less knowledgeable try to...

[Q] Help Needed

I have recently purchase a Note 4 clone phone from China. It works very well but I have a problem. When I got it I inserted an EE micro simcard which work fine whilst I waited for my proper talktalk simcard to arrive. Now however when I insert the talktalk simcard in I get no signal and the message emergency calls only.
I think with these types of the devices, once you insert the first sim card into it, they tend to lock onto that network and won't work with anyone other.
My question is therefore:-
Is there a way to unlock a Note 4 clone phone
If the phone can not be unlocked, I was thinking that if I back up the ROM and reflash the phone with the same ROM it might fix the problem. But I do not know how to back up the ROM. I've read a number of threads but still remain confused.
Any help would be greatly appreciated as I can not use the phone at all now. The device is rooted.
Thanks in advance

Any help guys
UK3G said:
I have recently purchase a Note 4 clone phone from China. It works very well but I have a problem. When I got it I inserted an EE micro simcard which work fine whilst I waited for my proper talktalk simcard to arrive. Now however when I insert the talktalk simcard in I get no signal and the message emergency calls only.
I think with these types of the devices, once you insert the first sim card into it, they tend to lock onto that network and won't work with anyone other.
My question is therefore:-
Is there a way to unlock a Note 4 clone phone
If the phone can not be unlocked, I was thinking that if I back up the ROM and reflash the phone with the same ROM it might fix the problem. But I do not know how to back up the ROM. I've read a number of threads but still remain confused.
Any help would be greatly appreciated as I can not use the phone at all now. The device is rooted.
Thanks in advance
Click to expand...
Click to collapse
Is anyone able to help?

Sim Card not inserted / Emergency Calls Only ?

I have this problem that I have just now and I have no idea fixing it. :c I used the sim card on my other phone and it works fine?
Any solutions? ;c

InsanityInside said:
I have this problem that I have just now and I have no idea fixing it. :c I used the sim card on my other phone and it works fine?
Any solutions? ;c
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Click to collapse
try to restart phone or reset phone reinsert sim

Simona Simmy said:
try to restart phone or reset phone reinsert sim
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Tried that already but to no avail :c

test with some other sims.
try factory reset.
If persists it hardware, hope you got working warranty :-/

InsanityInside said:
Tried that already but to no avail :c
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Click to collapse
warranty

I have the same issue and tried everything . The sim works in others phones but not in the Huawei. And other Sims cards work on the huawei
Sent from my HUAWEI MT7-L09 using XDA Free mobile app

Has there been any luck? I am having the same issue however it worked the first time i put the sim in the phone but after that it no longer reads it and now every time i take it out there's multiple scratches on the sim card. I just bought it and was thinking about contacting Huawei about the warranty. Any thoughts?

You have probably managed somehow destroy the SIM card slot. I've noticed comparing to other phones that HAM7 SIM card slot is annoyingly tricky when putting your card in. It might have happened that the contacts have broken. I've read in some thread that there has been problems with it when putting card in. And no warranty applies here but it might depend on Huawei service.

I'm having the same problem with mine. I contacted Huawei and they actually answered me and said they were going to tell me where to send it in and that was the last I heard from them. Hell I'll pay to have it fixed just as long as it can be fixed.

Any luck? Was it the SIM card reader?
I think I have a similar problem, but I don't think I managed to damage the card reader.
Any help would be appreciated!
http://forum.xda-developers.com/mate-7/help/little-help-getting-telephony-please-t3226935

Sw33t_Lov3r said:
Any luck? Was it the SIM card reader?
I think I have a similar problem, but I don't think I managed to damage the card reader.
Any help would be appreciated!
http://forum.xda-developers.com/mate-7/help/little-help-getting-telephony-please-t3226935
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Click to collapse
That problem is happening also with P8 Lite (phone from a friend of mine), SIM card is new, and no solution. Only reboot solves temporarily the problem

I am having a similar issue. I am overseas my phone is network unlocked. I brought a overseas SIM to get data. My phone does not recognise the new SIM. It still recognises the old SIM so I don't think there is a problem with the SIM reader. I have tried turning off and on and reboots etc. No luck. Really would like the data so that I can use google maps for navigating

HTC Desire 820 randomly stops detecting the SIM card

Hi everyone, my old HTC Desire 820 has a problem. It randomly stops detecting the SIM card from yesterday (I checked another sim cards and another device, it's a smarthphone fault, not a sim card). I looked through various tips in google what could be the reason and how to fix them, but they didn’t help. I will add that sometimes for example for 2-3 minutes everything is okay the sim card works well and a moment later when I start using a smartphone I got info “No sim card, no service”. Any help would be appreciated.

TaylorLaw1 said:
Hi everyone, my old HTC Desire 820 has a problem. It randomly stops detecting the SIM card from yesterday (I checked another sim cards and another device, it's a smarthphone fault, not a sim card). I looked through various tips in google what could be the reason and how to fix them, but they didn’t help. I will add that sometimes for example for 2-3 minutes everything is okay the sim card works well and a moment later when I start using a smartphone I got info “No sim card, no service”. Any help would be appreciated.
Click to expand...
Click to collapse
Maybe the SIM tray hardware in the device is failing or maybe you need to reflash the stock firmware for your device. The device is old, it isn't hard to imagine that the hardware or software may have become corrupted.
Sent from my SM-S767VL using Tapatalk

Droidriven said:
you need to reflash the stock firmware for your device.
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What do you mean exactly? Can you suggest any specific rom?