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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_
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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?
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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?
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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...

T-Mobile not working with OPO

Hey everyone thanks for your help in advance... I just bought my phone and went to T-Mobile to get a new micro Sims card. After putting it in, the phone didn't recognize it. I put in the APN settings and it doesn't save it. This really sucks right now because I don't know what else to do. Any help will be greatly appreciated. And my phone isnt rooted yet, just want the stock for now. Thanks again

Is the sim activated? Sometimes on a new sim it takes a few hours to start working.
I was already on Tmo with an N5. I just moved the sim over and all was good.

NaterTots said:
Is the sim activated? Sometimes on a new sim it takes a few hours to start working.
I was already on Tmo with an N5. I just moved the sim over and all was good.
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What he said. If OP has another phone that uses a MicroSIM, put the sim in that phone and see if it works.
Also did u insert the sim properly into its slot?

zephiK said:
What he said. If OP has another phone that uses a MicroSIM, put the sim in that phone and see if it works.
Also did u insert the sim properly into its slot?
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You Quoted the wrong post.

NaterTots said:
You Quoted the wrong post.
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I actually didn't. I agreeing with what you said and added onto your point.
I didn't mean the u to be directed to NaterTots but to the OP. Sorry for the confusion.

I screwed up and instead of using my old Sim card and cutting I went into T-Mobile and had them activate a new micro Sim card and put it straight in. The old one is deactivated.

The new micro Sim does work in my old gslaxy S2 phone which used an older big Sim card. Its now using a Sim adapter.

suaverc118 said:
I screwed up and instead of using my old Sim card and cutting I went into T-Mobile and had them activate a new micro Sim card and put it straight in. The old one is deactivated.
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Did you insert the SIM card in the right direction and not upside down? I know thats silly to ask.

to be honest its simple man and actually nothing you needed to make a thread about. Simple go to TMobile store and try an already active sim card. Go to AT&T and see if they can put an active sim card to help you out. Basically go to anywhere that works with a TMobile or AT&T derivative and try it out. Nothing really else we can do to help you on this.
Not try to be rude or anything but its the truth. If none of that works then you may have to RMA. Also maybe find a friend or family member and try their sim . Good luck :good:

Should work. Using my one plus with Solavei (t-mobile based company) and having no issues.
Sent from my A0001 using Tapatalk

zephiK said:
Did you insert the SIM card in the right direction and not upside down? I know thats silly to ask.
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First time i've also put the tray wrong. True story

Just had this problem after coming from using the phone overseas and no signal whatsoever on the phone despite numerous restarts, SIM cleaning, and chats with T mobile. After verifying the APN was correct I went to Settings-->About Phone-->Status-->SIM Status and checked to see if the SIM was connected(it showed my phone number, but was disconnected). So from here went to Settings-->Mobile Networks-->Network Operators and let the phone find carriers automatically. Mine showed T-mobile(with a little SIM icon to the right of it), Verizon, and ATT. I clicked on T-Mobile and it registered and is now working.
Probably saved me $15 at the T-Mobile store. Hope this helps even just one of you.

Sprint variant - invalid sim

My phone tells me "invalid sim" when I insert any sim other than Sprint. I don't get an option to insert an unlock code. I feel this is all software related as multiple have reported the phone is the same hardware wise on every carrier.

What was the first sim you installed if I may ask?

Corwinder said:
What was the first sim you installed if I may ask?
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AT&T

Apparently there is an unlock folder in the developer menu.

Nextstep said:
Apparently there is an unlock folder in the developer menu.
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That's for the bootloader

When you put that AT&T sim it locked to AT&T

Corwinder said:
When you put that AT&T sim it locked to AT&T
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That's the best part, it's still locked to Sprint. Even with AT&T sim inserted first and completely reset to retry it. Still only accepts Sprint cards.

Was anyone able to figure out OP's question? I have the same problem too. I have a Sprint Galaxy S7 Edge and I'm trying to unlock it with a T-Mobile sim card, but I don't get the unlock code entry screen. I just get an invalid SIM card message. Where can I enter the unlock code? Thanks.

TehPirate_ said:
My phone tells me "invalid sim" when I insert any sim other than Sprint. I don't get an option to insert an unlock code. I feel this is all software related as multiple have reported the phone is the same hardware wise on every carrier.
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Were you able to solve your problem? I have the same issue, described in the previous post.

slycyberguy said:
Were you able to solve your problem? I have the same issue, described in the previous post.
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Hello, I am encountering the same issue. Please help? TIA

You either need to contact Sprint and have them send out a Profile Update to your phone to get it network unlocked or use a 3rd party service

Same problem here. Any solution? How to make my phone ask for an unlock code?

TehPirate_ said:
That's the best part, it's still locked to Sprint. Even with AT&T sim inserted first and completely reset to retry it. Still only accepts Sprint cards.
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slycyberguy said:
Were you able to solve your problem? I have the same issue, described in the previous post.
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i.amjen said:
Hello, I am encountering the same issue. Please help? TIA
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All, read this thread here. Looks like you can just call Sprint and get it handled or dish out some $$$, but I wouldn't recommend that.
http://forum.xda-developers.com/galaxy-s7/help/network-unlocking-t3330965

hello everyone. i have a samsung galaxy s7 edge from sprint. it has the glass crack a little bit but it was working perfectly and i didnt wet it or had it where it was humid. the thing is that it started saying "searching for service". customer service wasn't able to help, they gave me a new sim card but it stays on " Activating Hand Free" when i insert the sim card. any ideas? i even did a hard reset too but nothing. [email protected] if anyone can help
i took pics and video of what happens.

Question Sim issue.

I am facing a really weird issue.
Brief:
My phone will either work with sim A but when I insert my second sim both of them get undetected.
Story :
I have a 48 sim and an Airtel network sim. One day my phone hanged and restarted from then it isn't detecting sim and sim manager behaves weirdly.
But If I take the second sim out phone detects my first sim. But won't detect if I just let the second sim in or both sim in.
I have attached the screenshot of Sim manager when both Sims are inserted.

It is recommended to go to your carrier's customer service center and ask them to check or change the second SIM for you.

James_Watson said:
It is recommended to go to your carrier's customer service center and ask them to check or change the second SIM for you.
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Thank you for replying James.
The issue is that when I put both sim then none of them get recognised.

aka70698 said:
Thank you for replying James.
The issue is that when I put both sim then none of them get recognised.
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As James said above, i would also try and get a replacement SIM card.
I had a similar issue with my Note8 that my SIM would randomly stop working, after a few months of trying different things on the phone (including factory reset) i replaced the SIM with a new one (being the first replacement it was free on my carrier), after that i never had any more issues.