SM-G950FD missing GSM850 band - Samsung Galaxy S8 Questions and Answers

SM-G950FD missing GSM850 band
My S8 is missing GSM850 band. I probably never noticed that, but the problem is that this is the only working 3G band in the area I live now. I forced to use my older SM-G850W to get my service. To my understanding, GSM850 just disabled on this Russian variant. I have already tried to Odin similar ROMs from South Americas (same CSC: FOX) with no change.
Device Model: SM-G950FD
AP Firmware: G950FXXSBDTJ1
CSC Firmware: G950FOXMBDTJ1
CP Firmware: G950FXXSBDTJ1
Firmware Country: SER
Is there any way to get GSM850 enabled? Is flashing with G950FOWT9DTF1 possible? Will it help?
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alex_templar said:
SM-G950FD missing GSM850 band
My S8 is missing GSM850 band. I probably never noticed that, but the problem is that this is the only working 3G band in the area I live now. I forced to use my older SM-G850W to get my service. To my understanding, GSM850 just disabled on this Russian variant. I have already tried to Odin similar ROMs from South Americas (same CSC: FOX) with no change.
Device Model: SM-G950FD
AP Firmware: G950FXXSBDTJ1
CSC Firmware: G950FOXMBDTJ1
CP Firmware: G950FXXSBDTJ1
Firmware Country: SER
Is there any way to get GSM850 enabled? Is flashing with G950FOWT9DTF1 possible? Will it help?
View attachment 5224179View attachment 5224183
Click to expand...
Click to collapse
Technically the S8 with Exynos (like your device) should support GSM 850 MHz.
You can try to set the mobile network mode manually to 3g or back to auto - see my screenshot.

I did everything but it seems like the band is physically disabled (please see my initial screenshot)
The only way now I can imagine is to change modem/country...

Related

Check what band you are connecting with your Xperia!

I found there are a lot of "debug" apps in the firmware for Z3,
and I'll introduce the most interesting one - "Tech Mode by Sony"!
With "Tech Mode by Sony", you can check what band you are connecting only with your Xperia.
I only confirmed "Tech Mode by Sony" aka TechMode.apk is avairable in the firmware for Z3 / Z3 Compact 23.0.A.2.98 / 23.0.A.2.105.
Here is extracted files from Z3 D6603 23.0.A.2.105: Download
[UPDATE]
You can get Tech Mode for Z1 or Z2 by flashing/downloading Customized UK ftf
How to check connecting band
1. Dial
Code:
*#*#*386#*#*
or
Code:
*#*#*585*0000#*#*
2. "Tech Mode by Sony" will be opened, tap what you are connecting.
e.g. If you want to check LTE band, tap LTE and if you want to check W-CDMA band, tap UMTS.
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3. Check "Serv EARFCN" for LTE or "UARFCN" for UMTS
4. Open LG Space or some other apps such as EARFCN Calculator
e.g. Type number of "Serv EARFCN" to "Earfcn" of LG Space and click "Frequency ...".
Then you wil get band info like this:
For UMTS, click "UMTS Frequency" tab.
This is very useful if you are interested in network or unlocking bands.
Great! Tks for sharing this....
Anyway, tested on Z1 4.4.4 .133 firmware and all show N/A on the app. Some are display like IMEI......
Very helpful for me, T-Mobile would intermittently switch me to LTE Band 4 where signal was low instead of keeping me on Band 12 which gave me full signal. After disabling Bands 2&4, I am always on Band 12 now with full signal.
Not working for 5.1.1 on 6603
Great found!
Thank you so much my friend!!
It works on the Z2 with 5.1.1 ROM 264
Download the apk file, place it in system apps as 755 and reboot.. (you need custom kernel to write in system folder, or deactivate protection)
Thanks a lot
All other apps I've tried failed to read the earfcn Nr.
Hi @AndroPlus, I'm trying on a Z3C running stock MM 23.5.A.1.291 (booloader locked) D5803.
Both strings don't work. I mean, when I digit the last character "*" all the text I have digit (in the text dial number) is automatically deleted.
Is the apk working in this case?
Thanks

How to check which Samsung SM-G935F (S7 Edge) variant I have?

I am trying to register my phone onto Samsung's website but there are a ridiculous amount of variants of the SM-G935F.
About > Settings only appears to show "SM-G935F".
Any ideas?
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I settings>About Device>Software Info Baseband Version.
pomme123 said:
I settings>About Device>Software Info Baseband Version.
Click to expand...
Click to collapse
Wrong.
My 'Baseband version' is G935FXXU1APB2.
That is not on that Samsung list - probably because it's not asking for my baseband version...
EDIT: The SamMobile Device Info app on the Play Store found it for me.
I don't know exactly where you will find this information, but they are related to the version of software installed by the carrier - for example, the EVR variants are supplied by and locked to EE, the O2x variants are supplied by and locked to O2.
Mine came from the Carphone Warehouse - they tend to ship phones that do NOT have the carriers own software, and to confirm this, mine is the top variant in the list (ABTU). I registered my phone online using my phone, and it somehow auto detected the correct variant.
roybridge said:
I don't know exactly where you will find this information, but they are related to the version of software installed by the carrier - for example, the EVR variants are supplied by and locked to EE, the O2x variants are supplied by and locked to O2.
Mine came from the Carphone Warehouse - they tend to ship phones that do NOT have the carriers own software, and to confirm this, mine is the top variant in the list (ABTU). I registered my phone online using my phone, and it somehow auto detected the correct variant.
Click to expand...
Click to collapse
As I said in the post above, the SamMobile Device Info app on the Play Store found it for me.

How to change country firmware on SM-G935F?

So I've bought an international S7 Edge and I'm aware that it's not from my country (Australia). It's of northern Africa / Middle Eastern origin, but it was new, and unlocked, so whatever I figure it should be the exact same in whatever region, just the firmware will be different.
I'd like to change the firmware to my own country so I can use a couple of things like Samsung Pay.
My current system is:
AP: G935FXXS1APG3 - PDA
CP: G935FXXU1APEQ - PHONE / MODEM
CSC: G935FOJV1APF1 - CSC
Model: SM-G935F
I've had a look at this thread detailing stock firmware installs.
That seems pretty straightforward, and I've looked up the firmware on this site: http://www.sammobile.com/firmwares/database/SM-G935F/
(Is that site safe and acceptable for firmware?)
Is there anything else I need to do to swap from the north africa firmware to the australian firmware? Which seems to be PDA: G935FXXU1APF2
Do I just run odin and all my data and apps remain? Do I need to mess with modems or is that all included in the download link for the firmware?
One extra thing, with the stock firmware I just downloaded, I have the following files:
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Why are there 2 CSC files? What's the difference between HOME_CSC and just plain old CSC?
If you were, as in this case, on a XSA firmware and use the home_csc file instead of the csc file, your device would not be reset. If you change your csc and/or use the csc file included in the firmware package your device will be reset. In your case the device would be reset no matter what, as you want to change your csc.
RustyShackleford1950 said:
So I've bought an international S7 Edge and I'm aware that it's not from my country (Australia). It's of northern Africa / Middle Eastern origin, but it was new, and unlocked, so whatever I figure it should be the exact same in whatever region, just the firmware will be different.
I'd like to change the firmware to my own country so I can use a couple of things like Samsung Pay.
My current system is:
AP: G935FXXS1APG3 - PDA
CP: G935FXXU1APEQ - PHONE / MODEM
CSC: G935FOJV1APF1 - CSC
Model: SM-G935F
I've had a look at this thread detailing stock firmware installs.
That seems pretty straightforward, and I've looked up the firmware on this site: http://www.sammobile.com/firmwares/database/SM-G935F/
(Is that site safe and acceptable for firmware?)
Is there anything else I need to do to swap from the north africa firmware to the australian firmware? Which seems to be PDA: G935FXXU1APF2
Do I just run odin and all my data and apps remain? Do I need to mess with modems or is that all included in the download link for the firmware?
Click to expand...
Click to collapse
Guidance is on sammobile: http://www.sammobile.com/forum/showthread.php?t=30800
http://www.sammobile.com/forum/showthread.php?t=29918
https://www.youtube.com/watch?v=7SK3IMprKVQ
https://www.youtube.com/watch?v=y8AZyalTf5Y

[OREO] [G950F/G955F] [Duos Also] Select a specific band on your Exynos S8 or S8+

The Samsung Galaxy S8 and S8+ were recently updated to Android Oreo, and among its new features includes a full band selector (replacing the old service menu that was disabled with the security patch of November / 2017)
This mode lets you choose a specific network (as does the test menu in AOSP) and also choose a band specified within all supported.
Now, the only known way to enter this menu is through an activity manager (Nova Launcher or Quickshortcutmaker for giving examples) and look for the com.samsung.HiddenNetworkSetting app
When you find the activity, you must execute it and the next window will appear:
https:// imgur .com/a/61DJo
Where you can choose the network mode. If you open the side menu, you will see the other 2 options (Band Selection and 5G SA Mode) then select "Band Selection" and the following will appear:
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Here you can choose the available bands, and then activate the slider that says "Selection". In this way, the band chosen as the default (Remember that if you select only one of the bands, you will not have CA)
I remember again that this method only works with builds based on Android 8.0 Oreo (RAP or RB7)
I remember again that this method only works with the builds based on Android 8.0 Oreo (RAP or RB7) and I do not know if it will work on other models besides the international variants of the Galaxy S8 or S8+ (SM-G950F / FD and SM-G955F / FD)
That is all! For now, I will be alert to possible doubts, but I remember that this app is only available through a hidden activity within the Oreo update, and I do not know if it will be maintained in successive updates. I will continue informing.
Thank you so much
Thank you very much for this useful info and for some unknown reason I am not getting Band 40 in band selection menu even when I am 100% sure this phone support TDD band 40

Which USB dongle LTE modem for Android HU?

Hello,
could somebody advice which usb LTE modem dongle/stick could work with Android HU from Isudar?
There is PX5, Octa-core, Android 8, 4G RAM, 32ROM.
I don´t want to use dongle with LTE modem and Wifi hotspot, I would prefer Just LTE modem works with HU via USB port.
I´m from Czech Republic and would need:
LTE band 2100 (B1), 1800 (B3), 2600 (B7), 800 (B20).
Thanks
Alcatel One Touch Link W800 on a Dasaita PX5 flashed with Malaysk Rom. Looks like it should have the bands you need.
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Hello,
thanks, bands are ok.
I found that it's with wifi hotspot, do you use it with wifi hotspot or just LTE modem via USB to radio?
And do you think that it will work with stock firmware from Isudar?
Thanks
Making use of the topic...
Do I really need to root or change the room to use LTE modem with a usb dongle?
I Dont know the HU real manufactor.
Caska NavPro 8330
Honda Civic 9th
MCU: TS-AF.170829
Model Number: AC82XX (core x4)
1Gb of Ram
Android 4.4
wonderka said:
Hello,
thanks, bands are ok.
I found that it's with wifi hotspot, do you use it with wifi hotspot or just LTE modem via USB to radio?
And do you think that it will work with stock firmware from Isudar?
Thanks
Click to expand...
Click to collapse
I think it makes a ethernet connection and will disable WiFi for the stereo until it is unplugged. Will still broadcast WiFi hotspot for other devices to use at the same time. Not sure about stock firmware or unrooted since I do not have anything with stock firmware.

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