For is with the SM-G988U1 unlocked version, XAA, Samsung did not enable esim capabilities and who knows when they will. Was wondering if anyone has tried to rebrand flash using Odin or changed country flash to enable successfully? Not that I know if this is even possible since most of the countries with dual sim or esim have Exynos processor it seems and are not compatible for Odin flashing. Anyones help with this would be great!
bump!
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Issue: using 3 in the UK and they are running LTE Bands 3 and 20. I am looking at my wife's phone next to mine and she is camped on 3's Band 20. I am using an N900t and it won't allow me to enable those bands, even when forcing to either of them in the service mode. I'm running the OB6 firmware, CSC, and bootloader. The ROM is an Alliance TW 5.0 with TWRP as my recovery. I've also enabled CA as well as LTE Rev 10 to no avail.
I don't know much about how this OS works, but I am thinking that the baseband is reading the CSC and disabling the OCONUS LTE Bands, which is why they won't enable in the service mode. There is no other CSC for that firmware on sammobile, and I've read that flashing a mismatched CSC can cause incompatibility issues.
Thoughts?
The more I research, the more I'm confused. Can I use a CSC changer to change to the 3 UK region? I understand this will wipe the phone, but then will a nandroid backup reinstall everything on top of the CSC or well a nandroid replace the CSC? Will/should I have issues with a TMO fw/bl and non-TMO CSC?
CSC is a custom sales code. You can try changing it but I don't think this will help because the phone's software works with the installed modem software. Changing the csc doesn't change the modem software.
I thought the modem, to speak generally, was the set of drivers needed for everything to communicate correctly, while the CSC was the region and brand-specific coding that include the bands in which the hardware should search. Not correct? There are other stories of people flashing different region files and then have access to other bands.
The CSC is something added to the ROM to make it carrier specific. For instance, adding a T-Mobile USA CSC to an AT&T Samsung s4 will not allow the S4 to connect to T-mobile's network. Additional software modifications must be made to enable these additional frequency bands.
You can try to change the CSC but the CSC must exist for the particular carrier on the particular phone.
The good thing is that, from what I've read, there exists an international note 3 on 3's network. Does that mean, since it exists, I need to flash the international fw/bl and csc? I think it's the 9005.
The n9005 and T-Mobile note 3 support different frequencies and the n9005 has never been able to receive LTE in North America, regardless of what is done through software changes.
You will not be able to flash the bootloader via Odin but you may be able to flash it via TWRP. However, flashing an n9005 bootloader onto the n900t will probably hardbrick the phone and I advise against cross-flashing bootloaders.
"Hard-brick" as in unrecoverable or I'll just have to start over?
Hard brick means having it fixed at a repair shop, if possible.
Helo everyone,
I've been trying to flash my unlocked A505F device which I brought from ebay with A505U1 XAA firmware from samfirm as I live In the US and have been having trouble getting connected to my mobile network/ getting mobile data although I can call/text ( I didn't realize there were different models for different regions at the time of purchase). I was recommended this flash as it might add the LTE bands I need for my mobile carrier (Metro by tmobile). Unfortunately, despite having the Samsung drivers, the latest odin and A505U1 XAA firmware downloaded, the flash failed.
I was thus wondering if anyone has ever done this or if anyone has any tips on how to flash this firmware or any other advice on how to get the LTE bands for here in the US, as that's the only reason I'm doing this.
Thank you!
...because I use the phone in Europe. Given the firmware is North America I was wondering whether I need to change the modem in ODIN to get better reception/ 5g in Europe. The last Samsung I owned was the S4 where updating the modem to your region was ubiquitary. Not sure if this is still necessary and doable., so hoping for some advice.
Second question: I have a US S20 locked to AT&T. Will flashing the U1 firmware (incl. factory reset) also unlock the phone?
Cheers!
tpunkttpunkt said:
...because I use the phone in Europe. Given the firmware is North America I was wondering whether I need to change the modem in ODIN to get better reception/ 5g in Europe. The last Samsung I owned was the S4 where updating the modem to your region was ubiquitary. Not sure if this is still necessary and doable., so hoping for some advice.
Second question: I have a US S20 locked to AT&T. Will flashing the U1 firmware (incl. factory reset) also unlock the phone?
Cheers!
Click to expand...
Click to collapse
You can't mix exynos firmware and Snapdragon. I doubt you can use just the modem portion of a European exynos code. You can flash U1 code freely, but that does not unlock the bootloader. Do you mean you can't put any sim other than AT&T?
I didn't mean to unlock the bootloader (since that's not possible for US phones) but the sim so I can use my German sim card in Europe in this phone.
tpunkttpunkt said:
I didn't mean to unlock the bootloader (since that's not possible for US phones) but the sim so I can use my German sim card in Europe in this phone.
Click to expand...
Click to collapse
Do you know if I run the risk to brick my device if I tried to combine the exynos modem with a snapdragon rom? Cause otherwise I might just try it.
Hi everyone,
I am planning to get an unlocked S22 (AT&T unlocked, fully paid off) from the USA to my country (India). The box says it is following:
Model: SM-S901U
S/W: S901USQU1AVA7
Even though it is unlocked, i can see the SM-S901U does not support 2 5G bands which are used my in country (unlike the generic unlocked SM-S901U1). My question is that,
1) Since the s22 is basically from samsung, with the carrier models having control over the software, will i be able to flash to the generic unlocked firmware and model SM-S901U1 and get support for the other 5g bands too (i see the generic unlocked version SM-S901U1 has the 2 other bands that i need)?
2) Will the hotspot work and will i be able to recive OTA updates?
3) And the main question, will i require an AT&T SIM for the flashing process?
I was digging around the ultra thread for some info:
OTA and Non-OTA Firmware for S22 Ultra SM-S908U and S22 Ultra SM-S908U1 Versions
See Post #2 and #3 for the Links to the Firmware All of the firmware posted here can be flashed on any U or U1 Device. Each of the firmware's are NOT carrier dependent and only has carrier labels listed in order to have an idea if you might get...
forum.xda-developers.com
If someone can help/guide me, i'd be great!
Thanks and Cheers!
1. You will be able to flash s901u1 firmware (you will need a patched version of Odin to do so) but it still will not have the 5g bands, it's a hardware thing.
2. Hotspot will still work and you will be able to receive OTA updates when on s901u1 firmware.
3. No you will not, even when the phone is locked you will still not require a sim
Kesh2cute said:
1. You will be able to flash s901u1 firmware (you will need a patched version of Odin to do so) but it still will not have the 5g bands, it's a hardware thing.
2. Hotspot will still work and you will be able to receive OTA updates when on s901u1 firmware.
3. No you will not, even when the phone is locked you will still not require a sim
Click to expand...
Click to collapse
Thanks for such a quick reply
I had thought that the bands were locked via firmware (was hoping that samsung gave control to the carriers to control the bands via software). Sadly that doesn't seem to be the case
Since the s901u1 has those bands available (i checked here: https://devicebeast.com/devices/samsung-sm-s901u1-galaxy-s22-5g-uw-dual-sim-td-lte-us-256gb), i guess that will be a better buy for 5G.
I have an SM-S901N, unlocked snapdragon from South Korea, bought it last summer and rooted successfully using the method here. I've been running rooted, updating periodically with odin, everything works just fine. Except...
I'm in the US and use Verizon Wireless. The two features I miss: wifi calling and visual voicemail. These are both only available with the VZW firmware.
The U1 is also an unlocked snapdragon. Can I flash the U1 VZW firmware on my N and get these two Verizon features? Even better, can I use the HOME_CSC from VZW and change the CSC without a wipe? I've seen mixed info on whether you can successfully change CSC using odin without wiping, and have it stick. I assume the Verizon-specific features will require the CSC to be set to VZW in addition to everything else.
Your phone will die if you try