network unlock or modem swap i337m on 5.0.1 - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

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?

Related

[Q] Do I need to unlock to use BTU firmware?

I recently purchased a Galaxy S4 i9505 on EE from Carphone Warehouse, and flashed the 5.0.1 BTU firmware. After I did that I then read I'd need to be carrier unlocked, but I tried calling and receiving calls and messages and using 4g and it worked fine. I also saw some posts about flashing modems. Anyway I'm really confused about what I need to do; should I try and unlock or not. Thanks everyone for your help.
The BTU firmware has no carrier branding, which means it has no carrier logos or bloatware included in it. Other than the lack of carrier doodads, it's the same firmware. You shouldn't need to flash a modem as you already have the latest, from when you installed the BTU ROM. However, the S4 would need to be unlocked for use on any carrier if your SIM isn't an EE SIM. But, you either have an EE SIM, in which case you don't need to worry about it, or the S4 was unlocked by the store that sold it, in which case you don't need to worry about it.
TL;DR: Don't touch the ROM. Don't worry too much about the SIM because you can make calls and use data. You don't need to flash a modem.

S4 i9507 Flashing + CSC

So my S6 had an unfortunate trip in the lake, and I'm going to resort to my sisters old S4 (I owned one too, but I totalled it).
Mine was rooted and had GPE loaded on it.
My old model was an i9505 and noticed that my sisters is a i9507 which is a strange variant (assuming its 4G+).
Anyway, when she had it, the phone constantly overheated and would constantly reboot. We returned for repair many times, each time showing no signs of issue.
What I would like to know is;
Would i9505 roms suit this phone? Or would I have to make do with stock.
And secondly, I am with telstra and the S4 is with virgin (OPS). Is it as simple as flashing a i9507 ROM from telsra on it, or do I have to do something else? This is for the CSC of course.
Is the phone sim unlocked? I recommend sim unlocking the phone before flashing any ROMs, especially custom ROMs as the unlock code needs to be entered using a stock Samsung dialler.
CSC doesn't really matter if the phone is sim unlocked.
Stock firmware is here: http://www.sammobile.com/firmwares/database/GT-I9507/
audit13 said:
Is the phone sim unlocked? I recommend sim unlocking the phone before flashing any ROMs, especially custom ROMs as the unlock code needs to be entered using a stock Samsung dialler.
CSC doesn't really matter if the phone is sim unlocked.
Stock firmware is here: http://www.sammobile.com/firmwares/database/GT-I9507/
Click to expand...
Click to collapse
Hmm stock firmware is only 5.0.1 and not for the carrier that I want. It's been so long since I've modded (since I've had stock S6 since I bought it). Can I change the CSC on that rom, or would it be locked to Optus.
Anyway I've put in my Telstra sim and it seems to work for the moment, picking up the telstra network and changing the APN's to telstras (maybe there is a CSC in the phone for TEL too?).
Just would like to know now if I'm able to use a GEL or AOSP rom for the i9505.
Thanks for the response.
The firmware should not matter. The CSC files are a customization of app for a particular carrier. There are 3 carriers in Canada (Rogers, Bell, Telus) for the s4 and I can cross-flash the firmware with no problems. I would be surprised if the phone can't work with Telstra if it is unlocked.
According to these specs, the 9507 uses a snapdragon 600 chip which is the chip used in the i337m and 9505: http://www.gsmarena.com/samsung_i9507_galaxy_s4_with_s600_spotted_in_glbench-news-6571.php

Strange boot sequence and unlock problem

I have a second hand note 3 n9005 it is verry Co fusing as on boot before rom. Use to flash up o2 however it's locked to ee I recently paid for aim unlock and have to return to store as been a problem
Why would it show o2 bloat Ware but be locked to ee?
A friend said flashing new modem may help is this possible or no reply way to network unlock in UK?
Any help is much appreciated thank you
What is the model number on download mode?
The model is showing as sm-n9005
Thanks
Carriers will use a custom csc file on a stock rom which means there could be multiple carriers with the same phone and different csc files. For instance, I have a bell phone and loaded Rogers firmware on the phone but the phone remains locked to bell.

No LTE after change rom

Hi,
I had bought a Canadian s4 on ebay with version 4.4.2, I had root it for unlock the Italian language, and worked fine for two years but without ever receiving the H + and H bands, he was always on LTE or 4G...
A month ago I decided to do an upgrade it and factory reset because te phone had become very slow, so after total wipe I downloaded the stock Lollipop I337MUMUGOH3 Trinidad & Tobago (because unlocked and more native language) and flash it with Odin, but after the softkeys have not worked ... I tried some other stock rom without succes, with I337MUMUFNE2_I337MUUBFNE2_TTT 4.4.2 the touch is coming back to work even if typing * # 2663 # the phone shows fw version is 0x10 and the part's fw version is 0x1a and can't get touch fw update (IC's F/W is higher than Bin's F/W), but I lost LTE bands, now working bands are always H and H+ and never LTE or 4G ....
I tried to install different modems taken from other stock rom, but without success ...and QPST show me all bands enabled...
Maybe i must change the baseband ??? Witch baseband? And how can i do it??
How can I get back the lte without losing softkey? And how can update the softkey fw?
I do not know what else to try :crying::crying::crying:
Thanks in advance..
I recommend not trying to flash the AT&T s4 sgh-i337 firmware to the Canadian s4 sgh-i337m. If you are able to flash the stock AT&T firmware onto the Canadian s4, you will have a locked bootloader.
Did you change your cell provider? Does the sim card get LTE in another phone?
You can flash the stock Canadian LP ROM from sammobile.com to see if the buttons work properly.
I recommend not upgrading the touch firmware at all as there is a chance it will disable all touch functions.
But my model phone is SGH-I337M!!
audit13 said:
I recommend not trying to flash the AT&T s4 sgh-i337 firmware to the Canadian s4 sgh-i337m. If you are able to flash the stock AT&T firmware onto the Canadian s4, you will have a locked bootloader.
Did you change your cell provider? Does the sim card get LTE in another phone?
You can flash the stock Canadian LP ROM from sammobile.com to see if the buttons work properly.
I recommend not upgrading the touch firmware at all as there is a chance it will disable all touch functions.
Click to expand...
Click to collapse
The sgh-i337m does not have a locked bootloader. The AT&T s4 has a locked bootloader so flashing at&t firmware to your Canadian s4 could result in a locked bootloader or a bricked phone.
There are no stock ROMs for the at&t s4 above 4.1.2 from sammobile.com like there is with the Canadian version.
It's up to you If you want to flash AT&T firmware to the Canadian s4.
audit13 said:
The sgh-i337m does not have a locked bootloader. The AT&T s4 has a locked bootloader so flashing at&t firmware to your Canadian s4 could result in a locked bootloader or a bricked phone.
There are no stock ROMs for the at&t s4 above 4.1.2 from sammobile.com like there is with the Canadian version.
It's up to you If you want to flash AT&T firmware to the Canadian s4.
Click to expand...
Click to collapse
I'm confused, I need some advice how to restore lte bands on my phone without broke the softkey, I did not say want to flash the ATT firmware....
Some ideas?
I apologize for referencing the AT&T firmware. I misread your original post.
Have you tried flashing firmware for a Canada. It doesn't matter whether your flash firmware for Rogers, Telus, or Bell as long as it is at least version OH3.
audit13 said:
I apologize for referencing the AT&T firmware. I misread your original post.Have you tried flashing firmware for a Canada. It doesn't matter whether your flash firmware for Rogers, Telus, or Bell as long as it is at least version OH3.
Click to expand...
Click to collapse
But the Canadian firmware not work properly in Italy, I used it for 2 years without H bands, the TTT firmware is for the same phone but is open, maybe I must change the csc?
I suggested flashing the Canadian firmware to see if the firmware fixes the problem with soft keys. Once that is fixed, you can try other fixes to get lte.
You can flash the stock Canadian lollipop ROM and change the csc by dialing *#272*imei#.

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

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