Samsung Galaxy Grand Neo Plus - IMEI all zeros - Samsung Galaxy Grand Neo Plus Questions & Answers

Hello! I'm having the following problem: my IMEI is all zeros and when I insert a SIM card it says unknown in the SIM card manager. Can someone tell me how to fix this?

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Hi My Friends
How do i transfer phone numbers from my sim card to my device sgs II ?
any advice?
Contacts>menu key>import/export>export to SD card.

[Q] Second SIM Card Issue Please help

My friend have bought S3 Neo 3 days before - in which the second sim card slot is not working. The sim card status in sim card manager saying No Network Card
Refer the screenshot below.
If I switch between sim cards then sim 1 is working perfectly. What does no network card mean??
Please help ASAP.

Sim Card Invalid

When I put my sim card into my US cellular Galaxy Note 3 (Model SM-N900R4) I get Invalid Sim Card under notifications. Any way to fix this?
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[Q] Invalid SIM Card

My device is i9505 and it should be carrier unlocked, I bought it outside any carrier.
I have this device since mid 2013, with the same carrier and same SIM Card.
I only had 3G, and my SIM Card only supported 4G
Recently I noticed that they don't work anymore with just 3G, everyone with compatible device and SIM Card could use 4G
So I went to my carrier, and bought 4G SIM Card, it's from the same carrier I used for the last 3 years
But when I tried using it, my device said "Invalid SIM Card"...
I asked them to try the SIM Card on one of their devices, and the SIM Card worked, but on my i9505 it says "Invalid SIM Card"
I tested with my old SIM Card, and the device found no problem, but when you get a new SIM Card the old is blocked, the device recognized the old SIM Card but I can't make calls, receive calls, etc, etc...
As using my old SIM it still recognizes, I think it probably isn't a hardware problem...
Does anyone knows what could be causing this, and is it possible to fix?
I'm currently using Imperium LL v13 (Custom ROM)
I tried flashing a newer modem from my carrier based on this firmware:
http://www.sammobile.com/firmwares/download/48432/I9505VJUHOD2_I9505ZTRHOD2_ZTR/
I downloaded the modem from this post:
http://forum.xda-developers.com/showthread.php?p=61852508#post61852508
But it still says "Invalid SIM Card"
I also tested SIM Cards from some friends that use other carriers, these SIMs worked on my phone, and my SIM worked on all my friends phones, but when I try my SIM on my phone, it doesn't work...
On the screenshot below you can see my baseband version after flashing the newer modem:
https://hostr.co/file/bAGsLWMm8SJ1/Screenshot_2016-07-14-17-12-31.png
Below you can see the Invalid SIM Card message:
https://hostr.co/file/Etxov8AOmesF/Screenshot_2016-07-14-17-12-41.png
Network status using my SIM on my device
https://hostr.co/file/RfwMx61CqvzZ/Screenshot_2016-07-14-17-22-34.png
Network status using one of my friends SIM Card on my device
https://hostr.co/file/3xB6y6bAN8QI/Screenshot_2016-07-14-17-31-10.png
Network status using another SIM Card from another carrier on my device
https://hostr.co/file/QhT4WI5deWyq/Screenshot_2016-07-14-17-17-53.png
Network status using my SIM Card on my friends device
https://hostr.co/file/lQh4YtFf2LxF/WhatsApp-Image-20160714.jpeg
I had the same exact problem with my I9505 with my operator digitel ( venezuela) , the only solution i had was to ask them for another type of sim card
So it turns out that Lossadax was probably right, the store that I went probably had a type of sim card that wasn't compatible or they had defective sim cards there
I had to buy another sim card from another store, the connector had different size and layout, and now it's working!

NO SIM CARD ISSUE

I have ported Havoc OS 9 to my SMG600FY device, but I am facing a 'No SIM card' issue. When I enter the *#06# code in phone app, it only shows one IMEI instead of two, even though the device has a capacity for two SIM cards.
Please tell me how to fix this issue?

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