yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S22 Ultra] dj24:
So here's my dilemma:

I have a carrier S22 Ultra device from t-mobile (U device) here in the U.S

*#2263# gets me to the service menu band selection screen but unfortunately my phone doesn't list all the 5G bands for me to select so my understanding is that I have to go through the protocol simulation method and switch my CSC to GCF. Unfortunately I don't have a personal non work computer at this time so I can't utilize SamFW or this older guide to see if I can get it to work.

*#0011# gets me to the service mode basic information for SIM 1 and 2 on my t-mobile S22 Ultra U device. From here, I just can't seem to be able to get to the main service menu mode for my phone. Pressing service mode and then back 3 times or more does not kick me back out to the main service menu where I need access to go through the protocol simulation.

All the short codes listed here (*#73# for RF test, *#27663368378#*) don't work for me as well.

I recently had my phone unlocked by t-mobile since I bought it outright (not that it matters). I'm surprised that t-mo with their customer friendly reputation is following the Verizon playbook in restricting access to the main service menu but then again Samsung should just have enabled these bands for its users period as Apple does.

In the mean time It'll be a while before I travel outside of the U.S for which I'll need access to trigger all the foreign bands at that time so I'll continue to follow this thread until a U device main service menu code leaks or I buy a new laptop (which i don't really need except for the rare times like these that I miss not having one :()
[Samsung Galaxy S22 Ultra] peacey8:
You'll need a computer running windows to use SamFW FRP Tool to unlock the service menu codes first. No way around it unfortunately.
[Samsung Galaxy S22 Ultra] fsmeurinne:
Updated and redid the steps to unlock bands, didn't have to do the sw to unlock code, it kept working. So now on Android 13 with UI 5 official and all is good on my S22 Ultra. Thank you
[Samsung Galaxy S22 Ultra] peacey8:
Hey @lexcyn

So I told you it was working last week, but it suddenly stopped working for me (U1 phone like you). Someone on Reddit said Telus had their IMEI whitelist disabled for 2022 but enabled it in October/November, which makes sense to why it was working for me before but not anymore. Now neither VoLTE nor VoWIFI are working, and it says IMS not registered (used to say registered last month, I'm sure).

This is really annoying. Why would TELUS just do this when it was working? They probably want us to buy Canadian phones from them and just go out of their way to disable our services when they were working perfectly fine.
[Samsung Galaxy S22 Ultra] lolDayus:
so something that I've been dealing with for so long I kinda just automatically assumed: is there a setting to just disable the ability to hop between bands? I imagine it would have already been mentioned if it was possible but I just wanted to double-check since I've never had a factory-unlocked phone that can access the ServiceMode menus before.

this would greatly simplify my issue with needing to stick to one specific band when I'm at home since for some reason whatever algorithm they're using to determine if/when to switch bands just randomly lost its mind a couple months back at my location and now likes to just hop down to bands that are nowhere near as strong in signal or connection speed every few minutes
[Samsung Galaxy S22 Ultra] wr3cckl3ss1:
COMING SOON....THE RETURN OF CSC CHANGE WITHOUT ANY COMPUTERS.....still under heavy testing right now but coming soon, as well as other tricks. 😁😁😁

@peacey8 @PapaDocta @Abaddon
[Samsung Galaxy S22 Ultra] PapaDocta:
@wr3cckl3ss1

This is excellent news man.. I'm ready to test if you want.
[Samsung Galaxy S22 Ultra] cogelindo:
Hello, one question, my s22U is a 908U1 with csc XAA, but in my country 5g does not exist yet, does this also serve to enable something new in the Lte bands? because i'm wondering if it's worth me to do the procedure, thanks
[Samsung Galaxy S22 Ultra] dj24:
Thanks for all the hard work you guys are putting in on this.
[Samsung Galaxy S22 Ultra] wr3cckl3ss1:
The thing about this...it's not really too user adaptable yet. And right now it requires the use of installing 3 more apps on the phone. But it's still a work in progress as I'm completely mind blown as to how it came to be. This menu was accessible thru the diaper method and Samsung blocked it completely. But digging into the s22 files locally and leaks gave me ideas. But one thing for sure is that Samsung sucks when it comes to to interpreting certain words they use compared to vanilla AOSP. Also....all my time is fully engulfed in another phone...I have...the VERIZON Pixel 7 Pro and getting the bootloader unlocked. Verizon says it's not them. Google says as well. But looking t the coding and source says they're liars. But we will see. I say soon on the new tricks but it's looking like it'll be in a couple weeks. But I will share here. And this will probably be something that can work on other newer Samsung devices.
[Samsung Galaxy S22 Ultra] XdaBoy01:
Same thing happened to me. I have an SM-S908U1 (S22U - model XAA).

All you need to do is go to settings; developer options and revoke USB debugging permissions... then turn USB debugging off and on again. Now you can repeat the process on SamFW application
[Samsung Galaxy S22 Ultra] aprwx:
This worked well for me on an Unlocked Galaxy S22 Ultra Android 13 with One UI 5.0.

I have the latest, original firmware, not rooted or modded in any way. US version (XAG) in the US on Tmobile (via Mint) with a 2nd eSim on AT&T (via DENT) that I use as a backup for internet should primary service have no signal.

I did have some hiccups initially that may help others:

0) The two secret codes did not work initially.

1) When trying the OP instructions; it would hang in the SamFW software "Waiting for DIAG". Trying to change the USB settings to "DM + MODEM + ADB" did not work to get it moving.

2) I then tried the alternative hidden menu tool noted in post #169 to no avail (yet).

3) I later found I was on CSC: XAG, so I used the SamFW software to change CSC to XAA. Then going back and trying again the SamFW Software successfully enabled the secret codes. Or so it said. The codes themselves still did not work, even after reboot.

4) I then went back to page 9 of this thread (Post #169) there's an alternative tool to unlock the hidden menu that DID work after I changed the CSC, but did not work beforehand. This did enable the two secret codes that SamFW did not for me.

Success!

Lastly, I'll point out that this was surprisingly useful for me even here in the US because my DENT (AT&T) Sim would only give me LTE service. Probably because it's a MVNO reselling AT&T. Now I get 5G after these changes with about 200 meg down. But don't forget step C -> 6, changing the stack so it applies to Sim 2 if you have 2 sims.

Also, not sure if this is related, but afterwards I noticed I had no service on Sim2 as the APN was missing and I had to re-enter that. But that may have been missing for other reasons, I'm not sure.
[Samsung Galaxy S22 Ultra] peacey8:
LTE bands are usually all enabled so I don't think you have to bother unless you're having issues or you know some band isn't working.
[Samsung Galaxy S22 Ultra] peacey8:
Interesting, that tool to unlock hidden menu does the exact same commands as SamFW tool, so SamFW should've worked. I wonder if it was just a fluke on working the nth time.

Anyhow, glad you got it working!
[Samsung Galaxy S22 Ultra] mohitgalaxy3:
Can you please share how to access this menu.
[Samsung Galaxy S22 Ultra] wr3cckl3ss1:
Maybe in a few weeks. This method is not for the average user and requires a very clear understanding of how to input certain things. I'm looking at making it more user friendly.
[Samsung Galaxy S22 Ultra] soyelreyy:
If you have any other Samsung phones or phones. And your computer drivers history. Like I have a Moto I currently use I've been screwing with my brother's Samsung flip, it will get confused. And you need to just check your MPT driver and make sure it's the proper one at the proper time. It'll screw up Smart switch as well. You may just need to update the driver each time or just check it out. I've had mostly problems with MPT driver itself there's like five others...
[Samsung Galaxy S22 Ultra] soyelreyy:
Can somebody please enlighten me on what carrier aggregation actually is, is it better on or off.. I did everything in the guide and have achieved results, also have gotten into the 4636 menu using Google phone dialer which I couldn't b4.. If I put it in NR only I get NR SA but only 40 down which seems weird. Full bars. As much as full bars can ever actually mean anything other than what they want.

And curious about why whenever I see whether data and voice are LTE or NR or whatever it may be there's also in between "Override Network" listed... And wondering how that's chosen or whatever decides that. I'm just trying to achieve a little better down speeds. I'm in between 5G and 4G LTE but for some reason the speeds are horrendous. Like we're talking sometimes 14 down and 1 up..
[Samsung Galaxy S22 Ultra] fsmeurinne:
Can anyone confirm if the new security patch impacts this configuration?
[Samsung Galaxy S22 Ultra] peacey8:
Yes it works fine.
[Samsung Galaxy S22 Ultra] peacey8:
Carrier aggregation (LTE+/4G+) is when the phone uses multiple bands together to increase throughput and bandwidth. Obviously it's better on. You shouldn't disable it, it's on by default.

Just because you're connected to 5G doesn't mean you'll get amazing speeds. It depends on many factors like distance to the tower, tower congestion, signal level, and which band you're connected to. You definitely won't get good 5G speeds indoor also.

If you want to debug, when connected to 5G, use the *#0011# menu -> SIM 1/2 Info to look at which NR_BAND you're connected to and also look at signal level (NR-RSRP) and SNR (NR-SINR).

If you show us the numbers, I can tell you if the speed you're getting makes sense.
[Samsung Galaxy S22 Ultra] Neimad649:
Note20 Ultra users. Have any of you upgraded to android 13 and still have access to the Service Menu? I'm afraid to update to Android 13 so I have the update on pause right now with 10s left because I lost access to the service menu when I updated to Android 12 back in January and only got it back 2 days ago thanks to the thread.

If you already upgraded to Android 13, did the Service Menu transfer to Android 13 or did you had to use the computer to unlock the Service Menu again?

By the way, I have the T-mobile Note20 Ultra SM-N986U which is network unlocked.
[Samsung Galaxy S22 Ultra] Romeo Nickolas:
I'm on U1 and when I try beta the service menu is still working without doing all the steps again.

Edit: I mean the PC steps using samfw.
[Samsung Galaxy S22 Ultra] Neimad649:
Thanks. Things tend to change between beta revisions and official updates. If you upgrade to the official Android 13 please let me know if you still have access to the Service Menu. I'll stay on Android 12 for now until I get confirmation.
[Samsung Galaxy S22 Ultra] Romeo Nickolas:
If newer models can still access it I'm positve service menu will still work after the update on N20U.

Since downgrading is still possible from 13 to 12 I assumed you don't want the hassle of factory resetting so it's still good to wait for someone knows this.

I can confirm this once they'll push the A13 update this December for U1.
[Samsung Galaxy S22 Ultra] Neimad649:
I upgraded to Android 13 on my Galaxy Note20 Ultra from T-mobile SM-N986U and I still have access to the Service Menu.
[Samsung Galaxy S22 Ultra] peixotorms:
Does anyone know if this would work on SM-G906U1, the s22+ us version?
[Samsung Galaxy S22 Ultra] dex986:
Hello everyone. I have a problem . I bought a Samsung S22 Ultra S908E Snapdragon. This phone does not have LTE 800 band listed. Is there a possibility to unlock LTE 800 mhz? Thank you all. I'm new to the forum.
[Samsung Galaxy S22 Ultra] jesbu:
After I have enabled all 5g, can't choose

Lte/3g/2g again. I also tried *#*#4636#*#* still nothing

Any solution to this?
[Samsung Galaxy S22 Ultra] wr3cckl3ss1:
Did you try any of the steps for the guide? S908e does support that band...and following the guide could get you what you needed.
[Samsung Galaxy S22 Ultra] jesbu:
Thanks very much. I worked. Much appreciated
[Samsung Galaxy S22 Ultra] Mitalis:
I'm at a loss, I cannot get SamFW Tool to get past the "Waiting for DIAG" part. I have Samsung USB Drivers installed, and USB debugging enabled. The SamFW tool is able to read my phone state, phone number, software version, and it's connected... as far as the phone's firmware goes, I should be okay.. Under service provider software version it shows:

SAOMC_SMS908U1_OYM_FKR_13_0015 FKR/FKR,XAR/XAA

When I get to the "Waiting for DIAG" portion, I punch in #*0808# and select " DM+Modem+ADB" and hit okay.... Nothing happens with SamFW... It still remains at Waiting for DIAG. I cannot get past this point.
[Samsung Galaxy S22 Ultra] peacey8:
I noticed you're on FKR CSC. Try to change your CSC to VZW or XAA with SamFW first, then try the unlock secret codes steps.

Also, remove your SIM before switching CSCs, since it might switch back to FKR if you have your SIM inserted. Once you unlock the secret menu and see that it works, you can go back to FKR by inserting your SIM.
[Samsung Galaxy S22 Ultra] omek07:
Hello , did I understand correctl?

If we have a canadian,We have first to go to US variance software and do all the process to unlock the bands ,

My question is can we go back to Canadian firmware and having the bands unlocked ?
[Samsung Galaxy S22 Ultra] Romeo Nickolas:
Flashing from canada firmware to US isn't possible.

Just change it to XAA or XAC using samfw without sim then do the trick.
[Samsung Galaxy S22 Ultra] peacey8:
Sometimes, this will work directly on Canadian firmware. You might not need to flash US firmware. It worked for me on my Canadian S22U without first flashing US XAA. Try the instructions first on your Canadian firmware before flashing to see if it works and save you the extra step.

And yes if you flash US firmware then do the trick and flash Canadian back, the menu will still be unlocked. I've tested that. Though if you flash between American and Canadian firmwares, you will lose all data so keep that in mind.

Actually Canadian and US variants are the same phone, you can freely flash U1 firmware on W phones and vice versa.
[Samsung Galaxy S22 Ultra] omek07:
Hey bud , thank you for your reply , I knew that we can go from CA to US variance and vice versa .

I will try to do it without the flash of XAA. I already tried to access the secret menu with the code but no luck . I will try now with the SamFw and see if I can unlock it
[Samsung Galaxy S22 Ultra] omek07:
in the guide, it says that if it is stuck in waiting for diag then do the thing with the *#0808# . I did it, how long I have to wait after that?
[Samsung Galaxy S22 Ultra] peacey8:
When

When you dial *#0808#, it takes you to the USB settings immediately where you click on DM+MODEM+ADB. Did you do that? After that, SamFW should continue with the process (which was stuck on "Waiting for DIAG").
[Samsung Galaxy S22 Ultra] omek07:
So when we are saying stuck we mean when it stays to Waiting for Diag for long time but the green bar is still moving correct ?

Yes I did the *#0808# and change the setting but still is says waiting for diag.

Did you do it when you were on 4.1 or 5 ?

how long you waited before the *#0808#???
[Samsung Galaxy S22 Ultra] peacey8:
I first did it on 4.1. Though I and others have done it on 5.0 and it works too. Which CSC are you on? Also you're using the S22 Ultra?

I would try to switch to XAC CSC with SamFW (without your SIM card inserted) and try again, and if it doesn't work you might have to flash US XAA firmware.
[Samsung Galaxy S22 Ultra] omek07:
Yes i just got my S22 Ultra Canadian Version

Software Version TLS/XAC/TLS
[Samsung Galaxy S22 Ultra] omek07:
if i change the CSC to XAC through SamFw is it gonna erase all my data ?
[Samsung Galaxy S22 Ultra] omek07:
changed to XAC , started the SamFW and pressed the button . it says Enable Diag and below waiting for DIag and the green bar moves
[Samsung Galaxy S22 Ultra] omek07:
its weird because in your Picture goes from Modem Port to Serial Port and the Modem port which i am assuming is when you are changing the USB Settings as the guide. Mine it stays only in Modem port even if i change the setting
[Samsung Galaxy S22 Ultra] peacey8:
No it won't.

It should get past waiting for DIAG and say disabling DIAG after you switch it to DM mode. If it doesn't, then it's not working.

I would try a different cable. I did it on TLS before so I think it should work. You can also try this tool from a previous post to unlock the secret codes, which some users said worked for them, but I haven't tried personally.

If nothing works, I would just flash US firmware and make sure you're on XAA CSC (and yes you will lose data). That should definitely work unless you have some bad cable or drivers.
[Samsung Galaxy S22 Ultra] omek07:
I have not change the drivers since I have the S21 ultra . Do you think that I have to update the drivers ? Do you have the correct ones?

I changed cables . Maybe is the windows 11?
[Samsung Galaxy S22 Ultra] peacey8:
I did it on windows 11 as well, so should be fine. I would try to uninstall all Samsung/Android drivers and reinstall the latest ones from the link in the OP. Sorry, not sure what else you can try if it doesn't work other than flashing U1 XAA.
[Samsung Galaxy S22 Ultra] omek07:
thanks bud, i will install the new drivers and try again . I already used new cable with no luck .
[Samsung Galaxy S22 Ultra] omek07:
Success with the new drivers but when I use the codes nothing is happening !!!
[Samsung Galaxy S22 Ultra] Romeo Nickolas:
IDK that it's possible I thought U and U1 can only be flashed.

I'll try this firmware since I'm testing something. Thank you for this info.
[Samsung Galaxy S22 Ultra] peacey8:
Great, looks like it worked!

Did you try both codes? Did you try the shorter code *#73#? Make sure you're using Samsung Dialer.
[Samsung Galaxy S22 Ultra] omek07:
Yes I did try both codes and nothing happened
[Samsung Galaxy S22 Ultra] peacey8:
That's weird. Well in that case, I guess you're gonna have to switch to US firmware and try there. You can switch back after it works.
[Samsung Galaxy S22 Ultra] jerry855202:
Hi, I'm on S901U1 with XAA, which is then protocol simulated to GCF.

According to band selection, all bands are successfully unlocked.

However I'm having trouble getting CA on my carrier (FarEasTone, 466-01)

DISABLE CA COMBO CHECK is ON and presists over reboot.

Viewing basic information of said sim shows

CA-Not Config 0 0

UL CA Not Configured

However the carrier/sim works on a S9010 phone, with the same(relevant) LTE band support.

I'm at a loss right now.

Would appreaciate any ideas/direction to go from here, thanks.
[Samsung Galaxy S22 Ultra] peacey8:
CA shouldn't be restricted. This method should unlock all bands and aggregation.

Most ISPs only support CA on LTE/4G (and you will see it as LTE+/4G+ in the status bar). There are a very small number of carriers right now that do CA on 5G. If you're connected to 5G and your carrier doesn't do CA on 5G, you won't get CA unless you're on LTE. Are you having issues with LTE CA or 5G CA?

Also, CA is only active when data is being used. If you're idle, you will see "CA-Not Config 0 0" in the SIM info screen and no + in your LTE icon. But when you're using data, you should see "CA-Add (SX)" in the SIM info screen and your status bar should say LTE+/4G+ (if you're not connected to 5G).
[Samsung Galaxy S22 Ultra] jerry855202:
My current celluar plan is not a 5G capable one, sorry for not being more clear.

I did load testing by having a livestream in PIP mode while messing around with service menu.

And I was having trouble with LTE CA. It was unlocked (to just 2CA I think?) but I thought it was still broken because:

For whatever reason, my S22 (or my carrier/tower?) likes Band 7 waaaaaaaay too much.

Whenever it has B7 it just locks on to it and refuses to

1. Do CA with another available band like B3 or B28 that IS available and is a CA profile that my carrier supports, and

2. Get off B7 and moves to a better CA pair like B3+B28, even though it's considerably faster due to congestion on B7 with my carrier.

If I manually take B7 off with Band Selection, then it happily runs 100M+ on B3+B28 2CA.

I'm gussing it's some kind of cost-cutting measure or QoS, and not my phone's modem then in this case.

For the meantime I'll probably just manually lockout B7.

Thanks for the help.
[Samsung Galaxy S22 Ultra] peacey8:
I would also try simulating your CSC to XAA and doing the first method to unlock the bands. Perhaps XAA treats aggregations differently and have different costs.

Does your other local phone use this aggregation at the same place when connected to the same tower?
[Samsung Galaxy S22 Ultra] rayw_xda:
I think it's due to XAA or GCF not having band priorities. When I force GCF or XAA on T-Mobile USA it keeps hanging onto n71 SA 5 Mhz even though faster options like 100 Mhz n41 is available.

I ended up reverting to TMB CSC and but continuing to use the unlock instructions in the OP to have mostly the best of both worlds. However that probably won't help international users.
[Samsung Galaxy S22 Ultra] peacey8:
Intersting. In that case @jerry855202, maybe you should try simulating CSC to TMB if XAA also doesn't work (but make sure to unlock all bands with method 1 after simulating). Worth a try.
[Samsung Galaxy S22 Ultra] jerry855202:
My other phone (pixel 4a5g) with the same sim happily runs on 3CA at the same location/tower.

My phone is originally XAA, for whatever reason, DISABLE CA COMBO CHECK does not presistafter reboot, thus I just get no CA with XAA, with or without protocal simulation. That's why I sim'd GCF.

However it also seems to much prefer Band 7 on XAA, then B28 without CA.

Sim TMB is the same behavior as XAA. DISABLE CA COMBO CHECK also does not presist after reboot.
[Samsung Galaxy S22 Ultra] rayw_xda:
The disable CA Combo check is persisting after reboots for me, but I also run dual SIM setup.

Physical SIM is T-Mobile SIM and CSC is TMB. eSIM is an international roaming SIM and is XAA. I did not override the CSCs in this case. But, I did disable cidmanager to prevent the CSCs from changing when I switch to a different eSIM.
[Samsung Galaxy S22 Ultra] Neeko72:
i have a few questions, will this fix improper carrier aggregation for international users(slow network speeds?) On my older sm-s908u1 bands seem to be unlocked but the phone wouldnt aggregate them resulting in slow network speeds. Is there any way to permanently fix aggregation(throughout updates) and retain OTA's working on U1/XAA fw/csc meaning without changing CSC or even messing with flashing other fw at all??

edit: method 2 seems to be a "permanent Fix"(meaning that it remains working throughout updates from what i figure) is it not? is it dangerous? is it possible to revert back to default if one wants to afterwards? as OP mentioned in the first post method 1 will revert back to default with fw update and/or csc update.
[Samsung Galaxy S22 Ultra] lexcyn:
So I have a U1 S22U and for some reason I do not see the N78 band but I do see N71 - is this a limitation with the U1 model? I am on the XAA firmware.
[Samsung Galaxy S22 Ultra] rayw_xda:
It's due to Samsung being Samsung and locking bands behind CSCs. The XAA CSC sometimes freaks out and gets locked to 5G bands from the last inserted US SIM.

Following instructions in the OP will fix this issue for you.
[Samsung Galaxy S22 Ultra] lexcyn:
Yeah I did, but I am still not seeing N78. Phone was originally activated with a TMB SIM but the CSC is still set to XAA/XAA. Wondering if I flash to "XAC" (Canadian unlocked) it would unlock that band?
[Samsung Galaxy S22 Ultra] rayw_xda:
That means some steps in the OP were missed.

Did you follow exactly the outlined steps in "METHOD 1: Use the Service Menu to Unlock All Bands"?

For the "Protocol -> NR5G" section, did you repeat the steps for both stacks?