How To Guide How to Enable All Bands Through Service Menu on US/CA S22 series (including Sub-6 and mmWave)

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peacey8

Senior Member
Jul 28, 2013
254
193
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..
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.
 
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Neimad649

Senior Member
Jul 21, 2013
218
196
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.
 

Romeo Nickolas

Senior Member
Jun 16, 2022
98
26
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.
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.
 

Neimad649

Senior Member
Jul 21, 2013
218
196
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.
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.
 

Romeo Nickolas

Senior Member
Jun 16, 2022
98
26
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.
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.
 

dex986

New member
Feb 28, 2016
3
2
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.
 

jesbu

Senior Member
Nov 19, 2011
67
11
After I have enabled all 5g, can't choose
Lte/3g/2g again. I also tried *#*#4636#*#* still nothing
Any solution to this?
 

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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.
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.
 

Mitalis

Senior Member
Jun 12, 2010
172
8
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.
 

peacey8

Senior Member
Jul 28, 2013
254
193
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.
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.
 
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omek07

Senior Member
Oct 15, 2007
916
86
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 ?
 

Romeo Nickolas

Senior Member
Jun 16, 2022
98
26
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 ?
Flashing from canada firmware to US isn't possible.
Just change it to XAA or XAC using samfw without sim then do the trick.
 

peacey8

Senior Member
Jul 28, 2013
254
193
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 ?
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.

Flashing from canada firmware to US isn't possible.
Just change it to XAA or XAC using samfw without sim then do the trick.
Actually Canadian and US variants are the same phone, you can freely flash U1 firmware on W phones and vice versa.
 
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omek07

Senior Member
Oct 15, 2007
916
86
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.
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
 

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  • 3
    2
    And for those asking about VM app....i full accessibility to use it at my disposal...watch and learn
    1
    Does method 2 work even after a factory reset? or even an update? or if there are csc changes from an update will it revert?
    Everytime you reboot the device...do an update, you have to follow the steps again to get System Shell. Also...with the ability to enable the PRECONFIG menu...everything you set in there stays set.
  • 31
    What is this?

    This is a guide on how to enable all LTE and 5G bands on the US or Canadian S22 series phones by going through the service menu. This guide is mostly based on this S20U guide by mellojosh, but has been adapted for the S22U phone with more information added.

    Which bands can be enabled this way?

    All bands the phone supports in hardware can be enabled through the service menu. For the S22 Ultra, that includes all Sub-6 bands like n78, and mmWave bands, as well as 5G SA bands, as shown in this screenshot below.

    Bands List.jpeg

    Which phones does this method support?

    This method has been confirmed to work on:
    • Samsung S22 Ultra (S908U, S908U1, S908W).
    • Galaxy Z Fold 4. Thanks @Abaddon.
    This method works on both Android 12 (One UI 4.1) or Android 13 (One UI 5.0 beta).

    This method requires your device be on the US firmware (XAA or other US CSC), so as long as you can Odin flash XAA firmware on your device (such as Canadian variant), you should be able to do this.

    If you get this method working on your phone that isn't in the known list, post it here and I will add it to the list above.

    How To Guide

    You will need a Windows computer (or VM) and the Samsung USB Driver installed to do the following steps. Install the USB driver from here before proceeding if you do not have it installed.

    A. Flash US Firmware

    First, your device must be on US firmware (XAA or other CSC). You can skip this step and go to B if your device is already on US firmware.

    If you're not on a US firmware because you have another Snapdragon variant (like Canadian), follow the steps below to flash XAA firmware. Note this will WIPE and FACTORY RESET your device. ALL DATA WILL BE LOST. So backup if you need to.
    1. Download Odin 3.14.4 or latest version.
    2. Download US XAA U1 firmware for your device from SamMobile.com or SamFw.com. For example, for the S22 Ultra, download the XAA firmware for S908U1. Extract the contents of the firmware to somewhere on your computer. You should have 5 files (BL, AP, CP, CSC, HOME_CSC). We won't use HOME_CSC.
    3. Restart your phone and go into download mode. On the S22 Ultra, hold all three power and up + down volume at the same time until the phone starts, then press the up volume key to get into download mode.
    4. Open Odin and connect your phone to your computer with a USB. Odin should say your phone was added.
    5. Click each of the BL, AP, CP, CSC buttons and select the corresponding files from the firmware zip you extracted. For CSC, use the file that starts with CSC and not HOME_CSC (we won't be using HOME_CSC). Do not load anything into USERDATA.
    6. Click start and let it flash the firmware (see the picture below). If it flashed correctly, your phone will be on XAA firmware after it restarts and you will have to set it up again from scratch.
    7. Set up your phone and verify it is on XAA firmware by going to Settings -> About Phone -> Software information -> check that it says XAA/XAA,XAA/OOO under "Software provider software version". OOO here will be your phone's original CSC like XAC which you cannot change and do not need to.
    A - Odin Flash.png

    B. Unlock Service Menu Secret Codes

    The next step is we need to unlock access to the service menu. Usually this is locked by default, but it might already be unlocked for you.

    First check if you can access the service menu by trying each of these ways:
    1. Open dialer and enter *#27663368378# to try to get directly into the service mode main menu. The menu should open after you press the last # character, you shouldn't have to press call.
    2. Open dialer and enter *#73# to get into RF Test mode. Press Band Selection. Press three dots on top right -> Back. Repeat three dots -> back three more times until you get to the service mode main menu.
    3. If either of the above ways works for you to get to the service mode main menu, then you can skip the below steps to unlock the menu and go directly to instructions C.
    If you cannot access the menu with the above codes, then follow these instructions to unlock the secret codes.
    1. Enable USB Debugging in Developer menu.
    2. Download SamFW FRP tool 3.1 or latest version from here.
    3. Open SamFW FRP tool and connect your phone to the computer with a USB.
    4. Using SamFW FRP tool, go to MTP tab and click on "Enable Secret Code for Verizon". See the picture below. Note it works on any US CSC even though it says "for Verizon".
      • If in the program output you see it's getting stuck on "Waiting for DIAG", then dial *#0808# on your phone to open USB settings and select "DM + MODEM + ADB" then press OK. The program should then complete the step and then get stuck on "Disabling DIAG". When it does, using the *#0808# menu again, select "MTP + ADB" this time and press OK. Now the program should complete the step and say that secret codes was unlocked.
    5. Now you should be able to use *#73# for RF test, *#27663368378#* to go directly to service menu. Test it to make sure the codes work and the service menu is opening.
    B - SamFW FRP Tool.png

    C. METHOD 1: Use the Service Menu to Unlock All Bands
    • Enter the service menu using either way.
      • Open dialer and enter *#27663368378# to get directly into the service mode main menu.
      • Open dialer and enter *#73# to get into RF Test mode. Press Band Selection. Press three dots on top right -> Back. Repeat three dots -> back three more times until you get to the service mode main menu.
    • Use the service mode to set the following options. Note you can go back between screens with three dots -> back for quicker navigation, but I am just starting each option below from the main menu so it's easy to read.
      1. Enable all LTE and 5G bands.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> SYSTEM -> Next page 4 times -> SET LTE BAND CONFIG -> SET DEFAULT LTE BAND.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> NR5G -> NR5G PRUNE STATUS -> REMOVE NR5G PRUNE.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> GCF -> REMOVE ONLY NR WHITELIST.
        • Optional if you need to enable mmWave bands: Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> NR5G -> Sub6/mmWave -> ALL ENABLE.
        • Optional if you have issues going from LTE to LTE+ (carrier aggregation not working properly): Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> AS -> Next Page -> DISABLE CA COMBO CHECK -> DISABLE ON.
      2. Enable 5G NR features (DSS & CDRX) if needed. These options might already be enabled for you by default.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> AS -> Next Page -> NR CDRX CONTROL -> NR CDRX ENABLE. NR CDRX is 5G power saving mode.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> AS -> Next Page 2 times -> NR DSS CONTROL -> NR DSS ENABLE. NR DSS is 5G Dynamic Spectrum Sharing.
      3. Enable 5G SA if you're lucky enough to have a carrier with standalone 5G networks. This option might be enabled by default already.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> NR5G -> NR5G SA/NSA Mode Control -> SA/NSA ENABLE.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> NR5G -> NR5G SA/NSA Mode Control -> Remove SA permit list.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> NR5G -> Next Page -> NR5G NRDC -> NRDC ENABLE. NRDC is for dual connectivity with Sub6 + mmWave bands in parallel. Only applies to 5G SA networks and only if your carrier uses it.
      4. Restart your phone, then dial *#73# to get into RF Test Mode. Click Band Selection -> Sim 1 or Sim 2 (whichever you use). On this screen if you scroll down, you'll see a list of enabled NR5G bands. Make sure all bands are enabled. See my picture below.
      5. NOTE: Band selection won't be reset with a reboot, but might be reset after a CSC update (or a software update that includes a CSC update). You will have to re-do the service menu settings every update or re-flash of a CSC.
      6. NOTE: If you use an eSIM or a dual-SIM phone with a 2nd SIM, you need to change the NR5G stack before changing the NR5G related options above. Change the NR5G stack to Stack 2 with the following setting first.
        • Service Mode Main Menu -> UE SETTING & INFO -> SETTING -> PROTOCOL -> NR5G -> NR5G STACK SELECTION -> Select STACK 2.
      7. OPTIONAL: Now that all bands are enabled and usable, you can use the Band Selection menu under *#73# to selectively disable certain bands if you need to. This is not covered here but that menu is self-explanatory.
      8. If this method isn't working, try METHOD 2 below. You do not need to try METHOD 2 if this method ended up working for you.
    D. METHOD 2: Unlock all bands via Protocol Simulation menu.
    • If METHOD 1 above didn't work or not all bands were unlocked, you can try to unlock all bands by simulating a change in your CSC to GCF (Global Certification Forum). This won't actually change your CSC to GCF, but will change the options in the service menu as if you were on GCF CSC, which should give you access to all SA and NSA bands. Credits to @wr3cckl3ss1 for figuring out this method.
    • To do this method, first enter the service mode main menu using either of the following ways.
      • Open dialer and enter *#27663368378# to get directly into the service mode main menu.
      • Open dialer and enter *#73# to get into RF Test mode. Press Band Selection. Press three dots on top right -> Back. Repeat three dots -> back three more times until you get to the service mode main menu.
    • Using the service menu, change the following options
    1. Go to: Service Mode Main Menu -> PROTOCOL STATE -> PROTOCOL SIMULATION -> IMEI PRE CFG SIMULATION.
    2. In this menu, click [1] AP, then click GCF (last option). Then click [2] NET1 and change it to GCF as well. Do the same for [3] NET2. All GCF.
    3. Press [4] Write. Then restart phone.
    4. Check if all SA bands were unlocked. If not, repeat the band unlocking instructions from METHOD 1 above and then restart the phone and check again.

    Enjoy your unlocked LTE and 5G bands!

    FYI, I have personally tested this on a Canadian S908W on XAA firmware to enable 5G in Canada. In fact, I was even able to update to One UI 5.0 using the adb sideload method since I was on XAA firmware, and then I repeated the steps above to enable all 5G bands on the beta (service menu was still unlocked). So now I have 5G on One UI 5.0 beta in Canada! The trifecta!

    CREDITS

    @mellojosh for his guide on service menu band options on the S20U1.
    @wr3cckl3ss1 for his guide on selecting bands from the dialer for the S22 series phones, and for instructions on protocol simulation.
    @bigdave79 for reminding me about needing the Samsung USB Driver for this to work.
    7
    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
    3
    Excellent job sir.
    3
    Good morning, I confirm the method works on the SM-G998U1 with android 13 beta 2, YES IT WORKS
    3
    Anyone that is updating the S22 Ultra to Android 13 and One UI 5, does it keeps the setting or you need to re do the whole process? Also does this method still work? I'm affraid of losing 5G after I update it.
    You might have to re-do the process since the CSC is updated. Yes this method still works on One UI 5. I am on One UI 5 stable and it is working fine on S908U1 (XAA).