Galaxy S8+ not prompting for unlock code - AT&T Samsung Galaxy S8+ Questions & Answers

I have one galaxy s8 which was claimed to be unlocked b4 buying it,put in my sim and it's writing "invalid sim card,sim card not supported"if i go to settings and search for available networks,it will bring different networks but wont allow me to register on it.if i try to call...it will say "not registered on network"
I made an enquiry and they said if it is locked,it should prompt for an unlock code immediately i put my sim inside.even if i wana unlock again,d phone is not asking for any unlock code neither is it asking for unfreeze code.i also tried secret codes with it and it is not working #7465625*638#.it is a branded at&t phone

You may need to configure the APN for the new carrier manually. Go to settings, connections, mobile network, then APN (Access Point Names), select add and type in new APN settings.
However if that doesn't work, It may be hard locked. Meaning that an invalid sim unlock code was entered too many times. In my past experiences if it doesn't prompt you for the code when you enter a new sim card it is either hard locked or already unlocked and needs the APN settings configured. However after inserting a new sim card the phone would normally configure the APN automatically and only on occasion would I need to modify it to get data/text working properly.
Sent from my SM-G955U using Tapatalk

invalid sim card,sim card not supported means it is locked device, i would like to help you to unlock it if you're interested

I'm facing this same issue. When I got the phone I installed an unbranded firmware (XAA/XAA/ATT) and I've since upgrade to Oreo. I can't seem to restore an ATT firmware so I can be prompted to enter the unlock code. Any suggestions?

make sure you using non at&t sim and it must be an active sim card. submit an unlock request to at&t on their website or use an unlock service like attunlocker.us to get your code.

andykit said:
make sure you using non at&t sim and it must be an active sim card. submit an unlock request to at&t on their website or use an unlock service like attunlocker.us to get your code.
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Click to collapse
The issue is there's no prompt to enter the unlock code.

is the SIM card active that you are using? what SIM is it?
markgm said:
The issue is there's no prompt to enter the unlock code.
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Click to collapse

andykit said:
is the SIM card active that you are using? what SIM is it?
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Click to collapse
Yes, it's a T-mobile SIM.

Sorry to necro, but does no one have a solution for this? I've seen plenty of threads such as this but very few solutions.

Necro double-post, I'm really asking for it...
First, you have to get an unlock code from the carrier. I had AT&T and it told me my phone was active under an account (previous owner). When you call AT&T and ask for an ulock they loop you to the website and you can't progress there, so you just have to ask for "customer service" twice and then get to the second level support. They can get you an 8 digit code for unlock. But I still never got prompted for the code and neither AT&T (5 calls), Cricket (3 calls), or xFinity (3 calls) could tell me how to get to the unlock screen. The following did it.
My solution was to use the following method, as found on https://www.tenorshare.com/samsung/samsung-unlock-code.html:
Step 1: Open the phone and type #7465625*638*# in the dialer.
Step 2: Then, it will ask for the Samsung Reset Code, it is an 8-digit code.
Step 3: Provide it and you will be done.

Related

[Q] T-Mobile SIM Unlock - Can't manually enter SIM Unlock Code - "Use Unlock app"

[Q] T-Mobile SIM Unlock - Can't manually enter SIM Unlock Code - "Use Unlock app"
Turns out I still don't have coverage at home with T-Mobile's network. I purchased my Z3 D6616 outright (full price). However, when I insert a SIM from another carrier, I get this message* instead of the usual prompt to enter a SIM unlock PIN. I guess they only want you to use their new unlock tool, as a way to prevent 3rd party unlocks.
Am I really stuck using T-Mobile for 2 months because this phone cannot be unlocked manually with a PIN, like most phones? Is there any workaround to bring up the menu to enter the unlock code?
*This device can be remotely unlocked if eligible. Please use the Device Unlock application to unlock the device. . ."
I have the same issue. Unfortunately I was not able to find a solution yet.
I've read somewhere that the Simlockunlockapp.apk is missing from the firmware (this is the default app used by Android to display the network unlocking popup).
cucuruz said:
I have the same issue. Unfortunately I was not able to find a solution yet.
I've read somewhere that the Simlockunlockapp.apk is missing from the firmware (this is the default app used by Android to display the network unlocking popup).
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Click to collapse
Yeah, I'm betting they removed the ability to do so in favor of their new "Device Unlock" app, that way people cannot unlock via a 3rd party. I'm bummed because I already paid for an unlock code, but have no way of entering it! :crying:
I believe legally they have to unlock. Try calling customer support.
shanooga said:
Yeah, I'm betting they removed the ability to do so in favor of their new "Device Unlock" app, that way people cannot unlock via a 3rd party. I'm bummed because I already paid for an unlock code, but have no way of entering it! :crying:
Click to expand...
Click to collapse
I hope you are not a "current" T-Mobile user, because if you are they do it after 45 days of activation for free.
Do you find a solution? maybe if we root the phone and install another rom we can have the ability to input the network code, another thing I did was refill my t-mobile account to a total of $100 USD to make me eligible to use the "unlock app"
macm_cell said:
Do you find a solution? maybe if we root the phone and install another rom we can have the ability to input the network code, another thing I did was refill my t-mobile account to a total of $100 USD to make me eligible to use the "unlock app"
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Click to collapse
Did you find a solution? I have the same problem I have the unlock code but I can't input in the phone

SIM/RUIM is Perso locked - No service

I have looked into what this could mean, and finding that I have a pin on my sim but I dont
I can put my sim in my origonal device and works fine
this phone has been flashed with 2 roms both no signal only the 2nd rom was giving me this message at top of screen
one thing though, I am having to enter the sim unlock(phone lock from Three) code every time I reboot the phone, I obtained this code using the famous term emulater and running that specific string, this code enters fine and says
SSIM network unlock PIN, enters code, then gets - SIM Network unlock successful
any ideas
Forgot to add, if I go to settings, security, setup SIM/RUIM card lock
I click lock sim card and specify a code
Then tells me it cant because there already is one
I can choose Change SIM PIN, by entering the old one (12345? guess) then a new one
I have 1 attempt remaing before I have to contact my phone carrier
Phone is from 3 Mobile but my Sim is from O2, if I put this sim into my origonal device there is no PIN
Any ideas?
EFCLEE said:
Forgot to add, if I go to settings, security, setup SIM/RUIM card lock
I click lock sim card and specify a code
Then tells me it cant because there already is one
I can choose Change SIM PIN, by entering the old one (12345? guess) then a new one
I have 1 attempt remaing before I have to contact my phone carrier
Phone is from 3 Mobile but my Sim is from O2, if I put this sim into my origonal device there is no PIN
Any ideas?
Click to expand...
Click to collapse
I would follow the other method on that guide and SIM unlock that way. It will be 100% successful and then you will know if your SIM card has a pin lock or if your device is having trouble. Remember that you need to be on gingerbread firmware to use the diag.nbh so search the forums and read up before you act
Sent from my LG-D802 using Tapatalk

Unlocked for At&t help!

Hi all, just picked up a Note 5 that was supposedly unlocked as they were using it on Straight Talk. I put my SIM card in and it just pops up saying Invalid SIM Card. I go to change tge APNs and they are greyed out and I cannot save them. Tells me I dont have permission to edit or something like that. Any ideas??
natehale88 said:
Hi all, just picked up a Note 5 that was supposedly unlocked as they were using it on Straight Talk. I put my SIM card in and it just pops up saying Invalid SIM Card. I go to change tge APNs and they are greyed out and I cannot save them. Tells me I dont have permission to edit or something like that. Any ideas??
Click to expand...
Click to collapse
It's not unlocked.
Look up idone.apps or a similar service. I used idone.apps. They unlocked sim, and added apn for att.
Planet Z !! said:
Look up idone.apps or a similar service. I used idone.apps. They unlocked sim, and added apn for att.
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Click to collapse
Is your note 5 rooted? Can you still use samsung pay?
Sent from my SM-N920P using Tapatalk
It is rooted. I dont use samsung pay by choice. But my understanding is if you have root. No samsung pay. I have never tried. I live in central Illinois. Not that big here yet.
I would assume it was locked however I don't get the pop up telling me to enter my PIN to unlock it. It just opens like normal and says invalid SIM card. Then if I try to add an APN it shows none and doesn't allow me to add. Any way to see in a hidden menu of it is set to carrier unlocked or to get the PIN menu to show up?
natehale88 said:
I would assume it was locked however I don't get the pop up telling me to enter my PIN to unlock it. It just opens like normal and says invalid SIM card. Then if I try to add an APN it shows none and doesn't allow me to add. Any way to see in a hidden menu of it is set to carrier unlocked or to get the PIN menu to show up?
Click to expand...
Click to collapse
You have to get root and use online service to get unlocked. After that contact at&t and give you imei number to provision your phone. Make sure you have a lte sim card from at&t first. With root your able to edit apn.
natehale88 said:
I would assume it was locked however I don't get the pop up telling me to enter my PIN to unlock it. It just opens like normal and says invalid SIM card. Then if I try to add an APN it shows none and doesn't allow me to add. Any way to see in a hidden menu of it is set to carrier unlocked or to get the PIN menu to show up?
Click to expand...
Click to collapse
If it says invalid sim and you cant edit apn then the sim is locked to whatever carrier. It is not unlocked. Going to have to use an unlocking service.
I used idone.apps after the service has ran you have access to hidden menu, radio settings, and a few other tools in the unlock apk form idone.app. phone will reboot twices during unlocking service. Then att sim will work. I didnt have to call att to have them do crap.
Sent from my LG-D725PR using Tapatalk
Thanks guys! I ended up paying the $5 for the service to unlock from Ebay. Cheers.

Help,my galaxy s8+ doesn't prompt for unlock code when i inserted foreign sim

I have one galaxy s8 which was claimed to be unlocked b4 buying it,put in my sim and it's writing "invalid sim card,sim card not supported"if i go to settings and search for available networks,it will bring different networks but wont allow me to register on it.if i try to call...it will say "not registered on network"
I made an enquiry and they said if it is locked,it should prompt for an unlock code immediately i put my sim inside.even if i wana unlock again,d phone is not asking for any unlock code neither is it asking for unfreeze code.i also tried secret codes with it and it is not working #7465625*638#.it is a branded at&t phone
You can fix this. Or at least you can try to fix it.
Check this guide, there are several methods you can follMod Edit

Any way to unlock network carrier

I have a S8+ (955F version) which is locked to 3 in sweden.
Is there any way to remove the network lock?
I've tried 2 different ROM's but both seem to have the lock there
djxtc said:
I have a S8+ (955F version) which is locked to 3 in sweden.
Is there any way to remove the network lock?
I've tried 2 different ROM's but both seem to have the lock there
Click to expand...
Click to collapse
Usually the simplest way is to request an unlock code from your carrier, quite often carrier app will allow you to request the code.
Hope this helos
paul_59 said:
Usually the simplest way is to request an unlock code from your carrier, quite often carrier app will allow you to request the code.
Hope this helos
Click to expand...
Click to collapse
Unfortunately ive been in touch with the carrier, however they claim that they cant find the phone in their database and still the phone is preloaded with their app and it only works with their SIM card.
Try a third party, you'll have to pay or there is a guy here who does it free in his free time so don't bug him.
Flashing any ROM like you've done won't do anything. The lock isn't in the ROM software.
What message does your phone reads when you insert a non-accepted SIM Card?
Does it ask you for anything or does it display a message?
Also, check your IMEI's status on imeipro.info to make sure it is not blacklisted.
RossTeagan said:
What message does your phone reads when you insert a non-accepted SIM Card?
Does it ask you for anything or does it display a message?
Also, check your IMEI's status on imeipro.info to make sure it is not blacklisted.
Click to expand...
Click to collapse
It says:
"SIM Network Unlock PIN"
and then 2 buttons, Unlock or Dismiss.
Ive already checked , its not blacklisted. The device is brand new.
bmxmike said:
Try a third party, you'll have to pay or there is a guy here who does it free in his free time so don't bug him.
Flashing any ROM like you've done won't do anything. The lock isn't in the ROM software.
Click to expand...
Click to collapse
Do you know who that guy is? I dont mind paying for it.
I already tried a third party who claims they will send an unlock code within 10-30 mins. They sent me an app and also an unlock code. The app itself shows that "the device is permanently unlocked" but its not and they dont answer anymore now.
djxtc said:
It says:
"SIM Network Unlock PIN"
and then 2 buttons, Unlock or Dismiss.
Ive already checked , its not blacklisted. The device is brand new.
Click to expand...
Click to collapse
If your phone asks for SIM network unlock PIN, then you should be able to get the unlock code from any unlock code provider you find.
There is no need to install an app, you just need the 8 digits unlock code.
you can use https://www.unlockgsm.net website to unlock any network carrier.

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