Develop Bugs

Rom Question

Hello all.. I just purchased a unlocked note 2 from at&t from good 'ol craigslist lol... I have it flashed now to stock 4.1.2 with root. I plan to use this phone on t-mobile, and read forums about how you have to enable aws on the phone to get 3g/4g for their network. I also want to use this phone in the future for international use, as well as at&t's 4g and lte network. By changing the aws file, will I be able to achieve this?
Also in order to use call over wifi, I have to flash a tmobile rom as told by members on the forums, but there's also an international rom http://forum.xda-developers.com/showthread.php?t=2016575 here, will this rom already have the aws band enabled or do I still need to enable it? I know it's kind of a lot to ask for a rom that covers everything, but what is the closest to it? Would using a tmobile stock rom hurt me in anyways?

You're posting in the wrong section, but I'll answer you anyways.
1. The AWS mod is independent from everything else, except modem flashes. Meaning no matter what you flash, unless you're flashing a modem, the mod will stick (remain functional).
2. All the mod does is enable the AWS band that is natively supported by the phone, but AT&T purposely disabled. It doesn't disable any functionality. The file itself is a modem memory (very very low level) backup from a T-Mobile model, with the IMEI removed so that yours does not get overwritten. It flips an internal switch to enable AWS support, just like the T-Mobile model. Aside from lack of wireless charging on the T-Mobile model, the AT&T and T-Mobile models are identical. This mod just turns on something that was artifically disabled. Your phone will work on both T-Mobile and AT&T (2G, 3G, 4G, LTE) perfectly.
3. Wifi calling is built into the ROM. It's only available on T-Mobile ROMs. You can flash an international ROM but you won't have Wifi calling. I can verify this as I'm using an international ROM.
The only things to watch out for:
1) ONLY FLASH AT&T MODEMs. And when you do (even if you're reflashing the same one that's on your phone), you have to reapply the mod. If you accidentally flash a different modem (say a T-Mobile modem), you'll lose your IMEI temporarily and your phone will reboot every few minutes until you flash back an AT&T modem. Don't freak out.
2) AT&T and T-Mobile ROMs are intercompatible across both models. But again, only use the modem for your device.

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Product F(RED) said:
You're posting in the wrong section, but I'll answer you anyways.
1. The AWS mod is independent from everything else, except modem flashes. Meaning no matter what you flash, unless you're flashing a modem, the mod will stick (remain functional).
2. All the mod does is enable the AWS band that is natively supported by the phone, but AT&T purposely disabled. It doesn't disable any functionality. The file itself is a modem memory (very very low level) backup from a T-Mobile model, with the IMEI removed so that yours does not get overwritten. It flips an internal switch to enable AWS support, just like the T-Mobile model. Aside from lack of wireless charging on the T-Mobile model, the AT&T and T-Mobile models are identical. This mod just turns on something that was artifically disabled. Your phone will work on both T-Mobile and AT&T (2G, 3G, 4G, LTE) perfectly.
3. Wifi calling is built into the ROM. It's only available on T-Mobile ROMs. You can flash an international ROM but you won't have Wifi calling. I can verify this as I'm using an international ROM.
The only things to watch out for:
1) ONLY FLASH AT&T MODEMs. And when you do (even if you're reflashing the same one that's on your phone), you have to reapply the mod. If you accidentally flash a different modem (say a T-Mobile modem), you'll lose your IMEI temporarily and your phone will reboot every few minutes until you flash back an AT&T modem. Don't freak out.
2) AT&T and T-Mobile ROMs are intercompatible across both models. But again, only use the modem for your device.
Click to expand...
Click to collapse
Thank you for this clear response! What will flashing the modem do for me, as far as advantages than the stock? I am not planning to do massive overhaul on this device, I just want it to be compatible with every carrier including it's data! Also when performing this aws mod, do I need to manually change any apn settings, or will it automatically be picked up by the phone?

xterminater07 said:
Thank you for this clear response! What will flashing the modem do for me, as far as advantages than the stock? I am not planning to do massive overhaul on this device, I just want it to be compatible with every carrier including it's data! Also when performing this aws mod, do I need to manually change any apn settings, or will it automatically be picked up by the phone?
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Click to collapse
Nothing really. Sometimes a new modem will improve power consumption or data speeds. Sometimes it'll do the opposite and you'll want to flash back the old modem. And if you don't care, you rarely ever have to do anything. The modems are stock modems btw. They're extracted from official OTA updates so that you can use them on any ROM. As for APN settings, they may or may not be automatically set by the SIM. If I remember correctly my T-Mobile SIM automatically set it up. It's not hard to do though.
By the way, all AT&T LTE devices work with T-Mobile LTE out of the box. This mod just enables it for 3G ("4G").
Sent from my Galaxy Note 2

Product F(RED) said:
Nothing really. Sometimes a new modem will improve power consumption or data speeds. Sometimes it'll do the opposite and you'll want to flash back the old modem. And if you don't care, you rarely ever have to do anything. The modems are stock modems btw. They're extracted from official OTA updates so that you can use them on any ROM. As for APN settings, they may or may not be automatically set by the SIM. If I remember correctly my T-Mobile SIM automatically set it up. It's not hard to do though.
By the way, all AT&T LTE devices work with T-Mobile LTE out of the box. This mod just enables it for 3G ("4G").
Sent from my Galaxy Note 2
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Click to collapse
Ok i flashed the aws file but i only got edge speed! How do i manually change it to get lte or 4g
Edit 1.... Ok so it connected to 4G like 5-10 min later!! Also what is the main differences for an international labeled rom vs the tmobile rom for the att version? I mean since my phone is already unlocked, and have this aws mode enabled there's not a need for an international rom right?

[Q] How to enable wifi tethering for stock UCUEMJB 4.3?

I have been searching around for answers to my question for a few hours and have come up with nothing.
I originally flashed an older rom onto my phone in order to unlock it, then it did the OTA update to 4.3, following which I used CF auto root to successfully root it. Now this is what I have:
AT&T Galaxy S3
Android version 4.3
Baseband version I747UCUEMJB
Build Number JSS15J.I747UCUEMJB
SE Android Status Enforcing SEPF_SMSUNG-SGH-I747_4.3_0024
When I try to enable wifi tethering, either natively or through Portable Wifi Hotspot or other apps then I get the message that "Mobile data is not available or invalid SIM", neither of which is true. I have been able to get FoxFi/PDANet to work for bluetooth tethering, but not WiFi which I need for some of the devices I have with me.
I have seen that perhaps there are some modem/bootloader files that can be flashed over, but those seem to be specific to the leaked version of 4.3 , and I dont know if they would work for the UCUEMJB.
Is there any way I can do a simple mod to enable the wifi teathering? Would prefer to avoid flashing another rom bc Im traveling through Latin America and access to decent internet is a big issue (hence the need to tether).
Thanks!

[Q] Flash modem on non-rooted ROM via Odin. Possible?

Hi fellow xdaers,
have been a while since i last flash / rooted an android device.
i have a T805Y running KitKat when I bought it from Telstra (Australia). i have then flash the generic Lollipop ROM (T805YDOU1BOG1_T805YXSA1BOG1_T805YDOU1BOG1_HOME) using Odin.
since then, i am having random lose of 4G connection and no way of getting back my mobile connection until a reboot.
does anyone knows if I can load a Telstra modem (perhaps a modem from KitKat using Odin (not rooted). my suspicion is that the gneric Lollipop ROM is not liking Telstra 4G sim card. i have to restart my T805Y every 2 days. disabling mobile network/enable flight mode still does not work for me.
my access point is telstra.wap.
when the 4G connection goes offline, i am not able to make any changes to APN/network mode. when i select network operators, it says 'can't connect'
restart is the only choice for me.
Thank you.

If you find out let me know please. I have the same model and would like to install custom roms but I think our model has the extra 700mhz LTE band needed for Telstra 4GX.

Why can my Verizon M8 use 'GSM only' roms?

Hello,
I recently flashed the Verizon GPE marshmallow port, but ended up flashing the GSM only Skydragon GPE Mm rom, v6.01. I've been really happy with it so far. My Bluetooth, WiFi, data, LTE, GPS all seem to be working fine. What makes a GSM rom GSM only, why can I flash it on a CDMA device and have no problems? Or am I missing something?
Thanks

Want to add..
Would also like to add that it seems like this 'GSM only' rom actually works better for me when it comes to cellular data and handoff. Any thoughts? Would I potentially have similar luck with other GSM only roms?

zachman1750 said:
why can I flash it on a CDMA device and have no problems? Or am I missing something?
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Click to collapse
Skydragon probably has a modified kernel that happens to be compatible with the Verizon variant. Either the "GSM" ROM needs to have such a kernel, or you need to flash the proper kernel to get "GSM" ROMs to work on your phone.
Otherwise, you phone won't boot if you flash a "GSM only" ROM.

Canadian CSC for G960F/DS Not working

Hello everyone, I have had my G960F/DS for over a month and I just discovered the Canadian CSC package from @_alexndr from his DevBase thread: "https://forum.xda-developers.com/showthread.php?p=76516024&postcount=497", but have an issue I hope can be resolved. When I do a clean flash of the CSC package followed by DevBase, I keep getting a new sim detected message which prompts to reset my phone to use it. If I agree to reset and restart, it gives me two service providers "Rogers" and no matter which one I choose, the phone reboots and displays the same message.
I believe the issue could be that since I have to install TWRP to install the CSC and the ROM package, that it can't provide the proper reset process so it just loops. I know people mentioned since the Canadian G960W is a Snapdragon processor that the CSC is not compatible, but the CSC actually works as I get the same signal strength as I did with my S7 on LTE, it just the phone wants to always reset to install the CSC bloatware and it can't do that at the moment.
I thought to open this thread as it is a question and not necessary an issue with the DevBase ROM, so any help would be great!

I posted on the Devbase thread the following to hopefully help anyone else having this issue. I did find a workaround though. I basically flashed the OMX Multi-CSC and I opened up the Canadian Zip file provided and pasted all the files in the '/odm/omc' folder besides the two sales_code and CSC_Version files. I then opened up the mps_code file in '/efs/imei' and changed the code to RWC and my phone booted with RWC active and no prompts to reset it. I did realize though that Rogers doesn't allow WiFi calling or VoLTE on non-Rogers IMEI devices so it was kind of a waste of time. At least my Signal Strength is where it should be lol.
There may be a better solution and even though I have flashed many ROMs and been on XDA for a few years, this issue was new for me and hopefully this helps for anyone. Of course do a backup of your EFS and ROM before doing anything like this to be sure.

Andrw0830 said:
I posted on the Devbase thread the following to hopefully help anyone else having this issue. I did find a workaround though. I basically flashed the OMX Multi-CSC and I opened up the Canadian Zip file provided and pasted all the files in the '/odm/omc' folder besides the two sales_code and CSC_Version files. I then opened up the mps_code file in '/efs/imei' and changed the code to RWC and my phone booted with RWC active and no prompts to reset it. I did realize though that Rogers doesn't allow WiFi calling or VoLTE on non-Rogers IMEI devices so it was kind of a waste of time. At least my Signal Strength is where it should be lol.
There may be a better solution and even though I have flashed many ROMs and been on XDA for a few years, this issue was new for me and hopefully this helps for anyone. Of course do a backup of your EFS and ROM before doing anything like this to be sure.
Click to expand...
Click to collapse
I'm so glad I came across this because I am in an identical situation: I came from an exynos rooted S7 and now just got a G960F and I want to flash a Canadian CSC (XAC or KDO) so that my signal strength is better. I'm finding that my LTE speeds are way slower and I'm only getting one bar of 4G+ with my koodo sim card.
I will give this a try and see what happens. I'm thinking maybe I should have gone with a (I think) rootable G9600 and flashed a W firmware on it but we'll see how this works.

Hi @Andrw0830, was there really any benefit of the RWC CSC? I have the same model as you on Rogers and haven't noticed any particular problems with signal strength. I was considering modifying mine so Samsung Experience/Pay/etc recognizes I'm in Canada.

moo113 said:
Hi @Andrw0830, was there really any benefit of the RWC CSC? I have the same model as you on Rogers and haven't noticed any particular problems with signal strength. I was considering modifying mine so Samsung Experience/Pay/etc recognizes I'm in Canada.
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Click to collapse
Mainly the signal icon I noticed either shows low signal even if I am in the same area I know is good or the signal icon won't change so that is mainly a cosmetic fix. You do have the options of WiFi and VoLTE, but I found out afterwards that Rogers doesn't allow you to activate them when you purchase the phone elsewhere so not much advantage. Really the only thing might be the Reverse number lookup feature allows you to turn on when using the Rogers CSC.