[Q] sim card incompatibility - General Questions and Answers

I bought a T98 tablet on 4.0.4; but whenever I insert any sim card, the tablet just freezes at the android robot. I inserted the sim card after booting but still froze. what should I do?
A friend of mine bought a G - Tab P700+ on 4.0.4 which was working perfectly till we decided to enter an access point name; but the save command does not work. The thing just disappears whenever you tap the save button. what should we do?

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[Q] After firmware my phone does not see the sim card

Hello everybody! after firmware my phone does not see the sim card, I do not know exactly what was done with the phone, how to return the phone to factory condition completely?
Sometimes when I turn off the phone for a long time and then turn it sees the SIM card, but after restarting again invisible. help me please!

[Q] no network card in 2nd sim

hello xda developers,, recently my friends phone was block bec. his son atempt to open but it was screen lock and now it seems ruin the pasword. after that the will not open, then i hold the power,volume up,home button, and then i reboot. after that it back in good condition.. the suddenly after an hour of installing application, i noticed that the sim 2 slot says no network card but ther is a functioned simcard.. pls.help me to solved this case. i've done re setting the simcard mnger. but still no network card thanks.....

SIM card reading error. PLEASE HELP, im driving crazy.

Hi there!
So i got a NEXUS 5 32GB.
Short story: i had an old SIM card, like 5-10 year old, when i bought the phone. I cut the card into microsim, and worked like a charm. (You know, nexus stuff when no service sometimes like once in a week (restart solved always the problem)). Now i contracted with a new service provider, and the (3in1) micro sim i get is unreadable to the phone.
Detials:
-The new card working in other phones without problem.
-I went to my carrier and get a new sim card, doesnt work either. (so the sim card(s) not defected)
-Tried different SIM cards in my phone-> working only the old SIM cards, new micro sims doesnt
-Tried almost every softwere stuff, (factory reset, FR in recovery mode, flashing 4.4 android, flashing other androids, flashed radio files etc.etc) ->non of them worked.
-We disassembled the phone, the sim reader is looking perfect, not a scratch, all pins in order etc.
-THE MAIN problem: however i insert the new card(s), phone says only "No sim card, emergency call only". Can't even set up the mobile services, nothing. Only can turn on-off the NFC, Airplane mode etc.
-When inserting the old cutted card, works perfectly.
I'm paying now for 2month for the new card, but can't use it....
Please help me!!!
Any kind of help will be appreciated.
Thank you very much.
Have a nice day.
PS.: Sorry for my english, i'm from Hungary.
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Moto X Play SD Card Problems

Hi! I really need help with this phone. SD cards won't appear on my phone, they used to though. The problem, I suppose, started when suddenly my phone gave me an error message saying that my SD card was corrupted. I left it like that for a while, but the message never went away, until recently when I tried to fix it by formatting the card with my computer as FAT32 so I could root the phone. After that it recognized it but quickly stopped, it just disappeared, and every time I removed the card and placed it back in the message would appear for a second and vanish the next. I decided to try to format it again on the pc and see if it would get recognized on another phone (Moto G 2gen.. which had another card on it), and it did.. When I saw that the other phone could see it and even use the card, I tried to see if the one that was on that phone worked on my Moto X.. it didn't. It didn't even display the error message. So I placed the first card back on the Moto X Play and the corruption message appeared for what seemed like less than a second every time I remove and replaced the card, that kept happening for a while, until eventually no message appeared even if I rebooted the phone. The card can be used by just about anything, but nothing gets recognized on the phone. I don't think that the slot is faulty since I've had the phone for more than a year now and more than half of that time I didn't use an SD card, also the problem started just recently and the slot seems just fine, the sim card works great and it goes right on top of the SD card. Help would be much appreciated. Thanks!
PS: Is there anyway to root the phone without sd card? I really need to root it. Also the phone is running Marshmallow.

Stuck in Bootloop (Keeps loading Samsung Logo) - Loads after Removing SIM Card

While playing a simple game my phone suddenly restarted, till it reached Samsung logo, and kept restarting over and over.
I tried to shut down the phone by long pressing power button, but it kept restarting.
Finally I figured out to take the SIM card off, and it could load!
After it loads, everytime I insert the SIM againg it suddenly restarts, and repeats the bootloop again.
I tried to insert a friend's SIM card, the phone loads, but once I insert the PIN code, it restarts again, and bootloops again!
I also tried the following with the SIM card removed:
I scanned the phone for viruses, it was clean;
Safe Mode: bootloops with SIM card initially inserted, and same issue happens once SIM card inserted after loading Safe Mode;
Recovery Mode: I did only Wipe Cache, but it did not solve. I am trying to avoid factory reset because I don't think it is going to solve after all that!
The phone has still 20+ GBs free space of internal memory.
Model: SM-G970F/DS Exynos.
Software: One UI 4.1, Android 12.
If the phone boots and works okay without SIM card, then I'd suggest doing that; and then, go looking for a way to undo whatever happen'd. For example, if the game you were playing is an app, clear it's data and uninstall it. If it was on a browser you install'd, do same & set up a new browser; etc. BTW is your battery good, was it low when the trouble started? See if your 7-day battery history covers the time when trouble started.
Mina392 said:
While playing a simple game my phone suddenly restarted, till it reached Samsung logo, and kept restarting over and over.
I tried to shut down the phone by long pressing power button, but it kept restarting.
Finally I figured out to take the SIM card off, and it could load!
After it loads, everytime I insert the SIM againg it suddenly restarts, and repeats the bootloop again.
I tried to insert a friend's SIM card, the phone loads, but once I insert the PIN code, it restarts again, and bootloops again!
I also tried the following with the SIM card removed:
I scanned the phone for viruses, it was clean;
Safe Mode: bootloops with SIM card initially inserted, and same issue happens once SIM card inserted after loading Safe Mode;
Recovery Mode: I did only Wipe Cache, but it did not solve. I am trying to avoid factory reset because I don't think it is going to solve after all that!
The phone has still 20+ GBs free space of internal memory.
Model: SM-G970F/DS Exynos.
Software: One UI 4.1, Android 12.
Click to expand...
Click to collapse
Mina392, could you fix the problem in the meantime?
Since yesterday I have exactly the same problem. I also proceeded like you, nothing helped.
Even a reset to factory settings has not helped...
If the phone is connected to a good power supply, it seems to work with a inserted SIM card . However, as soon as the phone is disconnected from the power supply, it immediately turns off, enters into the boot loop, does not start and gets very hot...
The battery is still fine, so I don't think thats the problem. The phone is now 2.5 years old.
Model: SM-G970F/DS Exynos.
Software: One UI 4.1, Android 12.
This can only be a software problem with the firmware...
Does anyone else have any ideas?
Update:
It's really crazy...
After the problem was present for more than 24 hours, it seems to work again, although I did nothing...

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