Hi guys,
I just bought a used AT&T Samsung NOTE 1.
The seller claimed it was unlocked which most probably it is not because it does not recognize any SIM other than an AT&T SIM.
This is not the issue, though. When I stick a T-Mobile sim in it it and turn it back on, it does not display "Enter Network Lock Control Key".
Is this a normal behavior or am I missing something?
Come to think of it, when I inserted two international sims the phone displayed the following message "sim not provisioned mm#2"
Thanks.
I noticed my AT&T S5 didn't work on WiFi down here in Argentina as the AP used Channel 12 which is not included in the ROM's kernel. Very annoying! I had made sure to get the AT&T phone as they use the same frequency bands for non-LTE cellular as the telephone companies here. Unfortunately the boot loader is locked so I don't think I will be able to fix this issue.
But I got to thinking about the ways the phones can be locked down to restrict use. Here is my list which is likely not exhaustive. What am I missing?
Samsung "initial region" lock which requires 5 minute call
SIM lock to carrier
WiFi channels disabled (e.g. 12-14)
Screen lock w/ fingerprint, etc.
flash memory encryption, decrypt on boot
google accounts lock (needs account to enable after factory reset)
samsung account lock (needs account to enable after factory reset)
different frequencies for cellular coverage
bootloader locked
KNOX counter?
SIM card itself can be locked with pin
SIM card can require PUK code
Couple more:
SElinux restrictions
Permission managers
Wi-Fi tethering locks (rare on Android now)
App-specific locks (ie. Pin codes for banking apps)
Hi. My Samsung Galaxy S7 (SM-G930W8) is network locked and i have unlock code for it. Every time my phone restarts it ask for unlock code after inserting code it works with any sim. And also my WIFI settings won't save either. All saved WIFI networks will gone if i turn off my WIFI. Can any one help me with my problem its so frustrating?
Currently on stock 6.0.1
Sujil.Shakya said:
Hi. My Samsung Galaxy S7 (SM-G930W8) is network locked and i have unlock code for it. Every time my phone restarts it ask for unlock code after inserting code it works with any sim. And also my WIFI settings won't save either. All saved WIFI networks will gone if i turn off my WIFI. Can any one help me with my problem its so frustrating?
Currently on stock 6.0.1
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Are there no one who can help.?
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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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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andykit said:
is the SIM card active that you are using? what SIM is it?
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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.
The phone is unlocked it G970U1 model. After factory reset my sim card works perfectly fine during the initial setup screen calling works and even shows LTE on top but as soon as I pass the setup screen LTE goes away and when I try to call it shows me error " CALL NOT SENT" also when I click on the button to enable mobile data it shows me error "Security policy prevents use of mobile data" I really want to know what security is causing this issue also I have changed rom with different versions I get same error with everyone. How do I fix this issue what security policy is causing this issue ? Please help.
Phone locked to Consumer Cellular
If the phone is locked to Consumer Cellular, it will only work with their sim card. You will need to get it network unlocked to use it on any other network.
riggerman0421 said:
If the phone is locked to Consumer Cellular, it will only work with their sim card. You will need to get it network unlocked to use it on any other network.
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You know how unlock s10e cc locked?
As i can understand, it's not sp-lock. It's knox lock, as payjoy, rac etc.
As far as I know, you would need an unlock from the carrier. You might try to Google for network unlock codes, but I'm not sure how reputable dinner if those sites are.
If it is locked to CC anyone knows a way to unlock this as I don't find any service for this online. Z3x also only supports SPR , TMO and ATT also I tried changing CSC from XAA to others using chimera but it gives me success message but nothing actually changes.
what about when you get an unlock code and it says unlock successful and this still happens?