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MTK 6577/8377 dual sim, network problem

I have bought chinese MTK 6577/8377, which is dual sim, dual core tablet.
Android 4.0.4
Problem : When I insert two sim cards, it is allowing me to receive or make a call from only 1 sim card, and even if i make a call to another sim its showing that "this number is switch off". And lateron after some minutes even its network is not showing as well.
So, please if anyone knows how to resolve this problem, tell me.

network problem
[email protected] said:
I have bought chinese MTK 6577/8377, which is dual sim, dual core tablet.
Android 4.0.4
Problem : When I insert two sim cards, it is allowing me to receive or make a call from only 1 sim card, and even if i make a call to another sim its showing that "this number is switch off". And lateron after some minutes even its network is not showing as well.
So, please if anyone knows how to resolve this problem, tell me.
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1924922&page=2
Change ur imei by this method
1- go to em with this code "* # * # 3646633 # * # *" (just type it on call pad)
2- then follow that path --> CDS info --> Radio info --> Phone1 (for the first imei)
3- at the top there is a command line which begins "AT+" just type there "AT +EGMR=1,7,"IMEI_1" (instead of IMEI_1 put your first imei number)
4- hit send command
5-if you done just reboot the phone, if you change the second imei go to step 2 and select "Phone2"
6-and enter the code "AT +EGMR=1,10,"IMEI_2" (instead of IMEI_2 put your second imei number) hit send command
7-reboot
This will work I have checked thanks for original poster

Sure, this will work?
And by entering/changing this IMEI there won't be any problem at all?
And also please send me a link for its firmware also.
If any newer version is available, will be better choice.
Thanks a lot for your help
Sent from my MID using XDA Premium 4 mobile app

[Q] SIM1 cell network can't connect but SIM2 works

device : Advan Vandroid S4K (a.k.a Star Mini)
OS : 4.4.2
Processor : Spreadtrum sc7731 (sc8831 if use MTK Droid Tools)
Status : Rooted
I just rooted my phone with KingRoot and installed Xposed because I want change status bar style with Flat Style Bar Indicators, after that I continue browse modules and saw Lollipop Navigation Bar and install it, active it and reboot. I don't see the changes and open it for more help, I see tutorial there (paste this command below in build.prop), do it quickly, reboot. after that my device was bootloop. OMG
Googling for help and I found how to revive my device (I forgot the URL), it tells me connect device to PC and open command adb:
adb reboot-bootloader
In fastboot mode, write command:
fastboot -w
then disconnect device and flash stock rom with ResearchDownload, 5 minutes later my device alive again.
After flashing stock rom, SIM1 (2G/3G) can't connect to cell network, if I check IMEI with dial *#06# its null/null, but if I just use SIM2 (2G), IMEI still there and network still works. Please help me! I want my 3G back.
If radio off, sim1 card detect but no service in status bar. If radio on, no sim card in status bar and IMEI null/null
P.S. : Sorry for my bad English, I am Indonesian

om minta stock rom nya advan s4k sc7731 & sc8830

Pixel - ASOP - Missing Baseband

I am a newbie and not sure if this is the correct section to post.
Device: Google Pixel - Sailfish (5.0')
ROM: ASOP android-9.0.0_r20 with google and qualcomm proprietary driver, stock pre-compiled kernel and no other modifications
Lunch target: aosp_sailfish-userdebug
After flashing the device using "fastboot flashall -w", everything in the new android rom works except for the baseband.
Symptoms:
- SIM status - not available
- network, phone number, mobile network state, operator info, service state, signal strength, mobile voice network type, mobile data network type all show not available status
- IMEI - 'blank' and when clicked, the menu jumps back from "system->about phone->IMEI" back to "system" in a split second
- "system->about phone->android version->Baseband version unknown
- working sim card inserted, nothing happens
- logcat repeated prints this line: <timestamp> 4982-4982/com.android.phone W/ServiceManagement: Waited one second for [email protected]::IRadio/slot1. Waiting another...
What critical step am I missing here?

After post is moved, I saw similar posts in the same section. This is a known and unsolved problem, but a workaround is available.
Please look in the other thread as I cannot post the link directly.

[GUIDE] Enable 4g+/LTE-A Carrier Aggregation without Root on Stock Rom

As we all know, MiA1 has a Snapdragon 625 processor that comes with the X9 LTE modem which supports Carrier Aggregation (2CA) but the OEM has not enabled it.
With the help of this guide you can enable carrier aggregation in your mia1 even without unlocked bootloader and root access.
Tools Required
1. Minimal ADB Drivers
2. QPST Flash Tools
3. QxDM Professional
4. LTE Band Calculator for Android
Steps to Follow
1. Install Minimal ADB Drivers, QPST Flash Tool & QXDM Professional on your PC.
2. Enable USB Debugging on your MiA1 .
3. Go to Phone dialer and dial " *#*#717717#*#* " to enable Diagnostic Mode(See Update Section below before Proceeding).
4. Connect your phone to PC via USB Cable then your PC will detect the device and automatically install the drivers.
5. Open Device Manager on PC and look for Ports(COM & LPT), under this you will see your device listed as "Qualcomm HS USB Diagnostics 9091 (COM*)".
6. Now, Run QPST as an administrator then goto Ports tab and check if your device is listed there and it's state is enabled.
7. Run QXDM as an administrator then goto Options tab and click on Communications. Now a new window will open, in that select your device COM Port under "Target Port" and make sure that your device is selected under "PortType", then click OK.
8. Select "NV Browser" from drop-down menu under View and select "RF LTE" under Category Filter.Now scroll and find something like "RFNV LTE B* CA BC CONFIG"("*" denotes the band).
9. As MiA1 only supports 2CA. we can CA using only two bands
For Ex: B1+B3, B3+B5, B3+B40, B5+B40, B5+B5, B40+B40 etc..
You can select any two band combination that is supported by your carrier and is available in you region.
10. Now Open LTE band Calculator on your phone and select two bands (e.g. B3+B40). you will see a value like "549755813892" or something else(it depends on your bands selection).
11. In QXDM select "RFNV LTE B3 CA BC CONFIG", click on "Read" then double-click on Input and clear the default value "0" and type the value that we have calculated using LTE Band Calculator in step 10 above, then click on "Write". Now,do the same with "RFNV LTE B40 CA BC CONFIG".
12. Wait for few seconds and then disconnect the phone from PC.
13. Now,Restart your phone and turn on data you will see 4g+ icon in status bar. That's it.
Things to Remember
* In step 10 choose bands that are available in your region and make sure, that your carrier supports CA over that bands.
* In step 11, change the value of bands selected in step 10.
* You have to try and test multiple combinations to get the stable CA state because in some bands network is unstable.
* If you lose signal after this process or if you want to revert back then just repeat step 11 and put default input value which is "0" for MiA1.
To check whether CA is working or not
1. Open Phone Dialer and dial "*#*#4636#*#*" to enter in Testing menu.
2. Tap on Phone Information and check "LTE physical channel configuration".
If CA is working, It will show you two connections Primary and Secondary along with their bandwidth, otherwise nothing.
I have configured intra-band CA over band 40 on Jio4G.
You can look at the screenshots attached below for difference with or without CA.
Update
USSD code is now working on latest June 2019 Security Patch.
USSD code is not working on March/April/May 2019 security patch.
If the USSD code doesn't work then you have to root your device first to enable diagnostic mode and after that, you can proceed further from step 5.
There are two ways to enable diagnostic mode after root which are as follows:
1. ADB
Enable "USB Debugging"on your phone.
Connect it to your PC/Laptop.
Open "Minimal ADB & Fastboot" Command Prompt with administrative rights.
Type adb devices and press enter.
Type adb shell and press enter.
Type su and press enter.
Type setprop sys.usb.config diag,adb and press enter.
2. Terminal Emulator App
Install any "Terminal Emulator" app from play store e.g. Termux
Enable "USB Debugging"on your phone.
Connect it to your PC/Laptop.
Open "Termux" .
Type su and press enter.
Type setprop sys.usb.config diag,adb and press enter.

anshsharma240 said:
As we all know, MiA1 has a Snapdragon 625 processor that comes with the X9 LTE ​​modem which supports Carrier Aggregation (2CA) but the OEM has not enabled it.
With the help of this guide you can enable career aggregation in your mia1 even without unlocked bootloader and root access.
Tools Required
1. Minimal ADB Drivers
2. QPST Flash Tools
3. QxDM Professional
4. LTE Band Calculator for Android
Steps to Follow
1. Install Minimal ADB Drivers, QPST Flash Tool & QXDM Professional on your PC.
2. Enable USB Debugging on your MiA1 .
3. Go to Phone dialer and dial " *#*#717717#*#* " to enter Diagnostic Mode.
4. Connect your phone to PC via USB Cable then your PC will detect the device and automatically install the drivers.
5. Open Device Manager on PC and look for Ports(COM & LPT), under this you will see your device listed as "Qualcomm HS USB Diagnostics 9091 (COM*)".
6. Now, Run QPST as an administrator then goto Ports tab and check if your device is listed there and it's state is enabled.
7. Run QXDM as an administrator then goto Options tab and click on Communications. Now a new window will open, in that select your device COM Port under "Target Port" and make sure that your device is selected under "PortType", then click OK.
8. Select "NV Browser" from drop-down menu under View and select "RF LTE" under Category Filter.Now scroll and find something like "RFNV LTE B* CA BC CONFIG"("*" denotes the band).
9. As MiA1 only supports 2CA. we can CA using only two bands
For Ex: B3+B5,B3+B40,B5+B40 etc..
You can select any two band combination that is supported by your carrier and is available in you region.
10. Now Open LTE band Calculator on your phone and select two bands (e.g. B3+B40). you will see a value like "549755813892" or something else(it depends on your bands selection).
11. In QXDM select "RFNV LTE B3 CA BC CONFIG", click on "Read" then double-click on Input and clear the default value "0" and type the value that we have calculated using LTE Band Calculator in step 10 above, then click on "Write". Now,do the same with "RFNV LTE B40 CA BC CONFIG".
12. Wait for few seconds and then disconnect the phone from PC.
13. Now,Restart your phone and turn on data you will see 4g+ icon in status bar. That's it.
Things to Remember
* In step 10 choose bands that are available in your region and make sure, that your carrier supports CA over that bands.
* In step 11, change the value of bands selected in step 10.
* You have to try and test multiple combinations to get the stable CA state because in some bands network is unstable.
* If you lose signal after this process or if you want to revert back then just repeat step 11 and put default input value which is "0" for our MiA1.
Click to expand...
Click to collapse
Bro already a thread is there and a tutorial too....
If someone has a doubt then refer following tutorial...

@anshsharma240 what bands are used in india? For Jio, Airtel, Vodafone? Which career supports CA in india?

.:Addicted:. said:
@anshsharma240 what bands are used in india? For Jio, Airtel, Vodafone? Which career supports CA in india?
Click to expand...
Click to collapse
Right now, Only Jio and Airtel supports LTE Advanced through carrier aggregation.
Jio: band 3, 5 & 40
Airtel : band 3 & 40

Shobit Joura said:
Bro already a thread is there and a tutorial too....
If someone has a doubt then refer following tutorial...
Click to expand...
Click to collapse
Bro, apart from youtube link that thread doesn't contain any details and your tutorial is also in hindi.

anshsharma240 said:
Bro, apart from youtube link that thread doesn't contain any details and your tutorial is also in hindi.
Click to expand...
Click to collapse
Yeah the thread was here...detailed...
ENABLE 4g+/LTE+ in any device!, NO ROOT!,with PROOF!,DETAILED TUTORIAL! http://in.c.mi.com/thread-1729961-1-0.html
I think link was given there.....and its there..so i font thought of rewritting it and just pasted the link of this thread there ....

Shobit Joura said:
Yeah the thread was here...detailed...
ENABLE 4g+/LTE+ in any device!, NO ROOT!,with PROOF!,DETAILED TUTORIAL! http://in.c.mi.com/thread-1729961-1-0.html
I think link was given there.....and its there..so i font thought of rewritting it and just pasted the link of this thread there ....
Click to expand...
Click to collapse
It's mi forum link and it's not there in your xda thread.

anshsharma240 said:
It's mi forum link and it's not there in your xda thread.
Click to expand...
Click to collapse
There is a xda thread link , but never mind u did good , by writing it all here.?

Is there any method to testing or any confirmation that it really working except lte+ on status bar?

A speed test will tell you if working or not.

tanapak1 said:
Is there any method to testing or any confirmation that it really working except lte+ on status bar?
Click to expand...
Click to collapse
Yes, you can check whether CA is working or not.
1. Open Phone Dialer and dial "*#*#4636#*#*" to enter in Testing menu.
2. Tap on Phone Information and check "LTE physical channel configuration".
If CA is working, It will show you two connections Primary and Secondary along with their bandwidth, otherwise nothing.
You can look at the screenshots attached below for difference with or without CA.
I have configured intra-band CA over band 40 on Jio4G.

anshsharma240 said:
Yes, you can check whether CA is working or not.
1. Open Phone Dialer and dial "*#*#4636#*#*" to enter in Testing menu.
2. Tap on Phone Information and check "LTE physical channel configuration".
If CA is working, It will show you two connections Primary and Secondary along with their bandwidth, otherwise nothing.
You can look at the screenshots attached below for difference with or without CA.
I have configured intra-band CA over band 40 on Jio4G.
Click to expand...
Click to collapse
Does it works for inter band CA ? Like b5+b3 for jio and b3+b40 for Airtel. I tried through QXDM but not working for inter band CA . Only band 40-40 intraband CA is working. Can someone confirm this?
TIA

Vishal21896 said:
Does it works for inter band CA ? Like b5+b3 for jio and b3+b40 for Airtel. I tried through QXDM but not working for inter band CA . Only band 40-40 intraband CA is working. Can someone confirm this?
TIA
Click to expand...
Click to collapse
It works on both intra-band and inter-band CA.

anshsharma240 said:
It works on both intra-band and inter-band CA.
Click to expand...
Click to collapse
If so can you kindly post screenshot of network signal guru with interband CA?
TIA

Vishal21896 said:
If so can you kindly post screenshot of network signal guru with interband CA?
TIA
Click to expand...
Click to collapse
i can't because network signal guru requires root

*Solved*

Thanks for good guide. is there any root way to this process easier?

I am using Airtel, I want to enable 4G+ but my bootloader is locked. So, can I do this? After doing this, will I face any problems in OTA because of new firmware and modem with upcoming updates and any random reboots will happen?

shmp30 said:
Thanks for good guide. is there any root way to this process easier?
Click to expand...
Click to collapse
You don't need root access if you can enable diagnostic mode via USSD code

birarvindersingh said:
I am using Airtel, I want to enable 4G+ but my bootloader is locked. So, can I do this? After doing this, will I face any problems in OTA because of new firmware and modem with upcoming updates and any random reboots will happen?
Click to expand...
Click to collapse
Yes, you can do this even with locked bootloader. And you will not face any random reboot or OTA issues.

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

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.
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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.
Download Odin 3.14.4 or latest version.
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.
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.
Open Odin and connect your phone to your computer with a USB. Odin should say your phone was added.
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.
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.
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.
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:
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.
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.
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.
Enable USB Debugging in Developer menu.
Download SamFW FRP tool 3.1 or latest version from here.
Open SamFW FRP tool and connect your phone to the computer with a USB.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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
Go to: Service Mode Main Menu -> PROTOCOL STATE -> PROTOCOL SIMULATION -> IMEI PRE CFG SIMULATION.
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.
Press [4] Write. Then restart phone.
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.

Excellent job sir.

i'm on android 13 beta2 on unlocked s22 ultra.
after i click on "DM + MODEM + ADB" then ok,
it' still stuck at Waiting for DIAG....

Great effort man, Thank you.
but this will not work on variants like S908N Korea or the S9080 China correct ?

netnerd said:
i'm on android 13 beta2 on unlocked s22 ultra.
after i click on "DM + MODEM + ADB" then ok,
it' still stuck at Waiting for DIAG....
Click to expand...
Click to collapse
Which CSC are you using and which model (S908U1)?
When I tested this, I unlocked the secret codes first on Android 12, then upgraded to Android 13 and secret codes still worked. I'm not sure if you can unlock it directly on Android 13.
Are you willing to downgrade to Android 12 first to try?

Mem_0 said:
Great effort man, Thank you.
but this will not work on variants like S908N Korea or the S9080 China correct ?
Click to expand...
Click to collapse
Can you flash US firmware on the Korean and Chinese variants with Odin (normal or patched)? If you can get on US firmware, then it might work. I do not think it will work on other firmwares.

peacey8 said:
Can you flash US firmware on the Korean and Chinese variants with Odin (normal or patched)? If you can get on US firmware, then it might work. I do not think it will work on other firmwares.
Click to expand...
Click to collapse
I don't think that's possible as the pit files are different.

peacey8 said:
Can you flash US firmware on the Korean and Chinese variants with Odin (normal or patched)? If you can get on US firmware, then it might work. I do not think it will work on other firmwares.
Click to expand...
Click to collapse
till now there is no way to flash US on a Korean

Mem_0 said:
till now there is no way to flash US on a Korean
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peacey8 said:
Can you flash US firmware on the Korean and Chinese variants with Odin (normal or patched)? If you can get on US firmware, then it might work. I do not think it will work on other firmwares.
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The only Snapdragon variant that has the same pit file as S908U/S908U1....is the S908N. But to no avail. It fails.

wr3cckl3ss1 said:
The only Snapdragon variant that has the same pit file as S908U/S908U1....is the S908N. But to no avail. It fails.
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why does it fail ? bec of different pit files ?

The pit files are what partition the device. And....
S908U/S908U1/S908N have B0Q_USA_SINGLEW
S908E - B0Q_GBL_OPEXX
S908W- B0Q_CAN_SINGLEX
And even if you were to get it to flash. That still won't unlock the bootloader. Just an FYI.

I have made a lot of research and failure tries trying to change the CSC of the S908N I have from KTC to KOO, but every time it fails using Samkey or even Samfw, after further looking they said that Samsung had blocked the Korean variants starting from S21 I guess.
wr3cckl3ss1 said:
The pit files are what partition the device. And....
S908U/S908U1/S908N have B0Q_USA_SINGLEW
S908E - B0Q_GBL_OPEXX
S908W- B0Q_CAN_SINGLEX
And even if you were to get it to flash. That still won't unlock the bootloader. Just an FYI.
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I don't want to unlock the bootloader at the moment, I just want to change csc at first to KOO instead of KTC and after that maybe install international software.

peacey8 said:
Which CSC are you using and which model (S908U1)?
When I tested this, I unlocked the secret codes first on Android 12, then upgraded to Android 13 and secret codes still worked. I'm not sure if you can unlock it directly on Android 13.
Are you willing to downgrade to Android 12 first to try?
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yes, I'm on s908U1 with FKR/FKR, TMB/XAA (Visible wireless on sim, tmobile on esim).
if i downgrade to Android 12, will it wipe my data? i really don't wanna wipe my phone

netnerd said:
yes, I'm on s908U1 with FKR/FKR, TMB/XAA (Visible wireless on sim, tmobile on esim).
if i downgrade to Android 12, will it wipe my data? i really don't wanna wipe my phone
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Yes it might wipe your phone, I'm not sure. I wouldn't risk it without backing up first.
I haven't tested this on FKR. So if it doesn't work for you on Android 12, use SamFW FRP Tool to change your CSC to XAA when you're on Android 12. Then it should definitely work.

Thanks for this.
Question: if I'm on att or TMOB, does this unlock more useable bands for me?

netnerd said:
i'm on android 13 beta2 on unlocked s22 ultra.
after i click on "DM + MODEM + ADB" then ok,
it' still stuck at Waiting for DIAG....
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I'm having the same issue and I'm on Android 12.
EDIT: I'm an idiot. I did not have the Samsung Android USB drivers installed. Tried it again and now it works!

ekerbuddyeker said:
Thanks for this.
Question: if I'm on att or TMOB, does this unlock more useable bands for me?
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The phone already comes with all almost all the bands already. This guide just shows you how to enable them all.

Has anyone had any luck, I followed all the step to the T, but it still stuck on "waiting for DIA".

Running androind 12 / SM-S908U1
canada S22U

formula666 said:
Has anyone had any luck, I followed all the step to the T, but it still stuck on "waiting for DIA".
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Click to collapse
Install Samsung Android USB drivers from here.