Network locked Note 3 not accepting unlock code - Galaxy Note 3 Q&A, Help & Troubleshooting

Hello guys,
About 22 months ago I grabbed a UK Note 3 (n9005 iirc) on the O2 network and loved it to bits. I requested my unlock code in early April, received it and proceeded to grab a new phone and passed my old Note 3 onto my Dad.
The Note 3 had it's bootloader unlocked, rooted, custom recovery flashed and running SlimLP and is till pretty great.
So my Dad pops his Three SIM into the Note 3, it asks for the unlock code, he puts the code in direct from the email I received from O2 and... code failed, unlock unsuccessful. My Dad being my Dad, asked me to input the code and nada, no go. O2 sent me a new code today after I spoke to them this morning and informed them... that new code is exactly the same as the old one that didn't work.
I checked the IMEI number against the one in the email and they match perfectly.
Could the fact that the the bootloader is unlocked, the phone is rooted, there's a custom rom on and/or a custom recovery installed be affecting the unlock code? My Dad has everything else working to his satisfaction on the phone all except this whole network issue.
At this moment in time I am quite frustrated that despite having the code it's not straight away simple and working as expected.
Any assistance would be most welcome.

The bootloader has never been locked on the phone afaik.
The unlock code needs to to be entered using a stock Samsung dialler.
I recommend flashing back to stock, sim unlock, flash back to a custom rom.

audit13 said:
The bootloader has never been locked on the phone afaik.
The unlock code needs to to be entered using a stock Samsung dialler.
I recommend flashing back to stock, sim unlock, flash back to a custom rom.
Click to expand...
Click to collapse
I'm sure the bootloader was locked as it triggered the void warranty bit but it's been so long ago that anything could have happened.
SlimLP uses the stock dialler for Lollipop anyway but it's no pain to flash the phone with a stock rom (does it matter if it's an O2 stock ROM or can it be a stock Lollipop Rom?) and give that a go.
Personally I use PixelPro dialler which doesn't seem to take over the phone part like it used to, only the dialler side.... But that's by the by.

Knox and a locked bootloader and two different things.
Knox is present in almost every Samsung android phone running 4.3 or higher. It is Knox that triggers the change from 0x0 to 0x1.
Locked bootloaders are present on phones from att and Verizon. There could be others but these seem to be the most common. Att and Verizon note 3 bootloaders, once locked, have never been successfully unlocked as no one has been able to find a working exploit.
When I say stock dialler, I am referring to the stock Samsung dialler.

Flashed back to a 5.1.1 stock O2UK network ROM, entered the code and voila.... network unlocked.
Thanks for the assist.

Related

[Q] SGH-i337m - is my phone unlocked?

Sup all...
Simple enough question. I've spent many days doing searches here in XDA and google but haven't been able to find a clear answer. Or maybe I didn't look hard enough or understand the responses to others questions regarding this topic.
I recently got an S4 (i337m) from Telus. From what I understand, this is the Canadian model (jfltecan). I am not sure if it is unlocked or not however. I know that I should just use a sim from a dif carrier to test, but I don't have access to one at the moment. No one I know has a micro sim that is with a carrier I could use to test with.
I've installed TWRP and flashed Slimbean and afterward I flashed Paranoidandroid roms successfully if that is some sort of indication as to the lock/unlock state of the phone.
So is there any other way to tell? Is there a method of unlocking this phone other than using the *#0011# method or similar methods that I've tried and do not work. Is an Odin method available?
Thanks
If you got it from Telus, directly, 99.99% it's locked
The only way to confirm is by popping in a SIM from another carrier.
I think it depends on how u buy the device. I think if you get the phone on a contract, its locked, but i think if you purchase the device for full price, it should be unlocked. That's atleast how i think it works.
You are most likely sim locked. There is no Odin method to unlock. You should really just buy a code to unlock. Be very careful using the free unlock methods. After a number of attempts the phone will lock itself so you'll never be able to unlock. Others have also messed up their phones trying it.
Buy a code or even safer, FastGSM.com USB cable method to unlock
I am also on telus, if this works like the s3 unlock you need to be on the stock Rom, can be rooted but must be stock.check the s4 thread to be sure though. You can go back to the custom Rom after you unlock and the phone should still be unlocked
Your phone's boot loader is unlocked. Meaning we can install a custom recovery and install a custom ROM very easily. Your phone is Sim locked if you bought it from telus. This means you cannot insert a Sim card in your phone unless its telus. Any other carrier will not work. You can unlock your phone through Telus. They have restrictions on this however. You're better off buying an unlock code off the internet. Its fast and most likely cheaper and no it does not void warranty. Hope this helps
Thanks!
Just wanted to thank everyone for the replies/info.
My phone was sim locked. I did the easy method of purchasing an unlock code from a local shop here. All is good. I can use the phone on any supported GSM carrier and I am able to flash custom roms and what not.
Thanks again to all for the info. Much appreciated and it helped me increase my understanding on this topic.
-Talabis

SIM Unlocking Canadian S5 (900W8) after rooting

Going away, wanted to unlock by Rogers Samsung S5 so I can use a local sim card. Bought an unlock code on Ebay, but it was not accepted. Now I'm doing some reading, says that phones with customer ROMS sometimes have trouble with legitimate unlock codes.
So if it's true, I think I need to go back to stock and try. But I wanted to see if anyone had any experience doing this, if they think that customer ROM is the issue. Also do I have to just go to stock, or also stock recovery, and what about bootloader, does that have to be changed back if I've installed an updated bootloader?
Thanks a lot.

network unlock or modem swap i337m on 5.0.1

Hey people, I have an issue going on here.
I was going to unlock, but decided to reflash firmware and change the csc from rogers over to bell.
Kies recognizes the phone now as being a 'bell' phone, and have done an update just to confirm it but it still will not accept a bell sim. Every time I have inserted a bell sim it requests the 4 digit unlock code. The sim works just fine in my S3 and another bell S4, so that is not the problem.
All settings in the phone also show it to be 'bell', home screen and all, so the csc did take.
All the modems/firmware on sammobile are multi-csc, as i have tried to just flash the modem alone after I extracted it.
I could care less about being truly carrier free, as I am locked into a bell agreement through work.
Any suggestions on this, or do i have to purchase a code? I assume its locked now so I cannot downgrade to my understanding to a lower modem to use the service menu to unlock.
Thanks for the input.
I've flashed from a Bell 4.4.2 to Telus 5.01 without issue and the phone will remain sim-locked. The only difference I have seen between the Bell, Telus, and Rogers ROM are the carrier apps included with each ROM.
The sim unlock code is 8 digits long.
You should be able to downgrade the i337m's 5.01 stock ROM to a i337m 4.4.2 stock ROM. Then install the 4.2.2 modem, root the phone, run region unlock app, re-flash stock 5.01, and the phone will be sim unlocked. Doing this will trip the knox counter to 1 and void any remaining warranty.
I tried to downgrade, but it didnt take. I will try again. I know there was a discussion on booting the phone and not signing into google then reflash again. Is this needed?
Thanks for the reply.
Well, I got it to work this time. Much appreciated
You tried to flash a stock 4.4.2 rom from sammobile.com? Were there errors in Odin?

Flash G900I Stock Rom to G900T S5

My mum went to the US and Mexico from Australia last year for my brother's wedding and a holiday. She bought an unlocked T-Mobile Galaxy S5 and prepaid T-Mobile SIM to use over there.
However now she's back in Australia there are a few issues with the phone such as the T-Mobile bloatware and US defaults on the phone.
I thought it might be possible to flash an Australian variant of the stock firmware from the SM-G900I and searched for instructions and thought I'd figured out how to do it with Odin only to get a Secure Check Fail: aboot error message.
Some research I've done suggests the problem is with the baseband of the firmware I found:
G900IDVU1CQB1_G900IXSA1CQB1_G900IDVU1CQB1_HOME.tar.md5
Apparently the baseband of my mum's phone is: G900TUVU1GQC2
I was hoping to flash an alternative stock rom without rooting the phone and tripping Knox since it's still within warranty.
Any help/tips much appreciated.
First of all you should never flash different software on to phones they don't belong to it would more likely brick it bt if your phone is TMobile you can easily not root it by going into the developer setting and hitting oem unlock so that unlocks the bootloaders​ from there you can you can use odin to flash TWRP (a custom recovery) and then easily root it and then flash debloat scripts made from devs on this website to get rid of bloatware

Will my note 3 be sim locked again?

I have a note 3 with stock lollipop rom model n900w8 which is the canadian note 3 version. I just want to know if it will be sim locked again if I installed a custom rom like magma or darklord?
PS. I don't know if it was sim locked before, I just got it sim unlocked already.
Additional question: can I just go back to stock kitkat from stock lollipop without rooting?
How was it sim unlocked? With an unlock code, the phone should be permanently unlocked regardless of flashing a custom ROM or upgrading bootloaders and modems.
audit13 said:
How was it sim unlocked? With an unlock code, the phone should be permanently unlocked regardless of flashing a custom ROM or upgrading bootloaders and modems.
Click to expand...
Click to collapse
I don't know how it was unlocked. I just got it unlockef already.
poqi_ako said:
I don't know how it was unlocked. I just got it unlockef already.
Click to expand...
Click to collapse
Most likely it will never re-lock itself
Every phone that I got from a carrier and subsequently unlocked via code, including the n900w8, or a free method (i.e. Samsung note 2, s3, s4) has never relocked after flashing a stock or custom ROM.

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