Sim Card Issue after flashing latest firmware - Samsung Galaxy J7 (2017) Questions & Answers

I have this issue that when I flashed a stock firmware after flashing custom roms, whenever I pop another sim in to the phone, a message pops up in the notification area "Invalid sim card, network locked sim inserted". This never happened before that day.
SM-J730G

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My Legend see only my sim card :(

My Legend work only with my SIM card, i try to use many others SIM's, but it say "No SIM card", and work only with my fist sim, as i put into my phone. It rooted, i try wipe, official rom(from Vodafone with root), now i have CM 6.1.
It's not a sim lock, phone don't request any unlock codes, it's just load and say "No SIM card". Pleace, help

SIM card "Invalid card"

Hi everyone! Please help!
I have a problem with XT905. When i put sim card into phone its writes that sim card is invalid. But it(phone) can see when sim card is in the phone and when its not.
SIM card work correctly on the other phone.
What is need to do? Is it possible, that phone is locked to another carrier? In settings there is shown that phone is XT905 Australia.
Solved by flashing stock radio image.

No sim card detected after unlock bootloader

Hi after unlock bootloader via toolbox i got no sim card detected even after restore factory rom
What could be the reason for that? also its look like i flashed dual SIM ROM on single sim UK version device and its looks working ok
have you find a solution?
No sim card mostly results from flashing the wrong region firmware.

Galaxy S5 Vodafone - New rom Three, not detecting sim

I bought a new S5 that was Vodafone, of course I put my three sim in and it asked for a network code to unlock it, not wanting to pay for one, I rooted and installed a H3G 6.0.1 Stock rom, put my sim card in and now its saying no sim detected, and shows no signal at all. I remove the sim, it says please insert sim, emergency calls only. :/ Any suggestions?

SIM slots getting disabled/Empty

Hi,
I am having weird issue with the device, the sim card slots automatically getting ejected/disabled with in 5 minutes of device restart. I have to restart it again n again to make it stay.
Sometimes it stays upto 2-3 hours and then gets disabled, i have tired with different SIM cards the same issue persists with them.
I have ran the SIMI test ,it says working for two sims when they have network and if i do test after sim slot gets disables/ejected it shows "something wrong".
Is this related to software or the hardware??
I have the issue with both .313 and current version.
Using Airtel and Jio SIM.
any help?
Sim card is not detected
I'm having same issue, none of my sim cards show up it just says no sim. Also I'm on stock rom, never rooted or tinkered with in any way but upon checking the "root integrity check" in boot menu it says test fail . Could really use some help
Probably Google play services error update to the latest stable version.

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