Develop Bugs

A520F firmware compatibility of Single SIM firmware and Dual SIM firmware

Hi guys
I known that this A5 2017 model have two types.
1) A520F - Single SIM model
2) A520F/DS - Dual SIM model
I have question of Dual SIM model and single sim model firmware compatibility.
Q#1)What if i flashed Single sim firmware (EX)AU-Vodafone, CSC:VAU) on dual sim hardware model (A520F/DS),
Is it working only Single sim mode? or it can working Dual sim mode even Single sim firmware(VAU)?
Q#2) if Q#1 is true and flashed Single sim firmware then restore to Dual sim firmware (like India, Taiwan, UAE regions firmware will support Dual SIM),
Is it restored fully dual sim mode from Single sim firmware ? I am worrying if i flashed Single sim firmware then back to Dual sim firmware, modem(Like IMEI #1, #2)/baseband information lost or not
and bootloader locked by previous(Single sim) flashed bootloader. Also it it void Knox warranty? I known that official firmware cross flash is not void know warranty, is it correct?
Thank you

Just flash with odin, know will not be triggered by flashing official firmware.
Just test it, u won't lose ur data en if anything went wrong just flash your stock firmware back.

bassbounce said:
Just flash with odin, know will not be triggered by flashing official firmware.
Just test it, u won't lose ur data en if anything went wrong just flash your stock firmware back.
Click to expand...
Click to collapse
Thanks for your advance.
I will try it if i buy A520F model.
BTW ,Who have gps poor reception problem using A5 2017 model??
Some of A5 2017 users(A520S,A520F) have poor gps reception problem. They says it may hardware problem and sometimes they wont get gps signal on the Google maps even outdoor location.

Pulverizer said:
Thanks for your advance.
I will try it if i buy A520F model.
BTW ,Who have gps poor reception problem using A5 2017 model??
Some of A5 2017 users(A520S,A520F) have poor gps reception problem. They says it may hardware problem and sometimes they wont get gps signal on the Google maps even outdoor location.
Click to expand...
Click to collapse
GPS is really good, I have no problems with it.

No GPS issue here all works flawlessly, using A5 dual-SIM model
Sent from Public Phone

bassbounce said:
GPS is really good, I have no problems with it.
Click to expand...
Click to collapse
amlbuton said:
No GPS issue here all works flawlessly
Sent from Public Phone
Click to expand...
Click to collapse
Thanks for sharing exact information.

I rooted mine came with uae firmware. Installed french Firmware and everything is fine
Sent from my MI 5s using Tapatalk

rehanraza80 said:
I rooted mine came with uae firmware. Installed french Firmware and everything is fine
Sent from my MI 5s using Tapatalk
Click to expand...
Click to collapse
Hi, have you root Single SIM to DUAL Sim ? And you bought new holder for second SIM and everything is ok? Which FW have did you use?

Flashing S20+ SM-G9860

I recently obtained a Samsung S20+ SM-G9860. However, I am in the US and am intending to flash the AT&T firmware for the SM-G986U. When I try to do this, I get a secure check fail on the PIT file due to the differing model. Is there a way to circumvent this? The two models have identical hardware from what I can see.
Is it possible to do this, and what is the process for doing this if it is indeed possible?

You cannot flash a rom built for a snapdragon chipset on a phone with a exynos chipset
Be thankful there is that safety check built in. Lol
Sent from my SM-G988U1 using Tapatalk

tdevaughn said:
You cannot flash a rom built for a snapdragon chipset on a phone with a exynos chipset
Be thankful there is that safety check built in. Lol
Sent from my SM-G988U1 using Tapatalk
Click to expand...
Click to collapse
It's not Exynos, it's also a Snapdragon.

Oh, the Brazil variant. Still dont think it will work. They might be dual sim
Sent from my SM-G988U1 using Tapatalk

tdevaughn said:
Oh, the Brazil variant. Still dont think it will work. They might be dual sim
Sent from my SM-G988U1 using Tapatalk
Click to expand...
Click to collapse
It's the Hong Kong variant. It does appear to be a dual SIM, however.

YES PLEASE!! I need to change my S20+ Snapdragon SM-G986U firmware to SM-9860 too!!!
Sanctanimus said:
I recently obtained a Samsung S20+ SM-G9860. However, I am in the US and am intending to flash the AT&T firmware for the SM-G986U. When I try to do this, I get a secure check fail on the PIT file due to the differing model. Is there a way to circumvent this? The two models have identical hardware from what I can see.
Is it possible to do this, and what is the process for doing this if it is indeed possible?
Click to expand...
Click to collapse
YES PLEASE!! I need to change my S20+ Snapdragon SM-G986U firmware to Hong Kong SM-9860 firmware too! Any help please Samsung S20+ Snapdragons masters?!! :crying:

Sanctanimus said:
I recently obtained a Samsung S20+ SM-G9860. However, I am in the US and am intending to flash the AT&T firmware for the SM-G986U. When I try to do this, I get a secure check fail on the PIT file due to the differing model. Is there a way to circumvent this? The two models have identical hardware from what I can see.
Is it possible to do this, and what is the process for doing this if it is indeed possible?
Click to expand...
Click to collapse
The hardware isn't identical, SM-G986U is a Single SIM Device, your's is a Dual SIM.. TGY is the CSC in your device and even if you could flash SM-G986U Firmware the CSC would not change, it will still be TGY. If you're looking to get full AT&T call functionality on your device it's not possible as the CSC doesn't support AT&T compatibility. Firmware is CSC specific as well.

varcor said:
The hardware isn't identical, SM-G986U is a Single SIM Device, your's is a Dual SIM.. TGY is the CSC in your device and even if you could flash SM-G986U Firmware the CSC would not change, it will still be TGY. If you're looking to get full AT&T call functionality on your device it's not possible as the CSC doesn't support AT&T compatibility. Firmware is CSC specific as well.
Click to expand...
Click to collapse
But mine has two IMEI numbers though 1 for physical and another for esim, HOWEVER the esim option to add another QR code for another network is not visible. Its like the device is locked for VERIZON esim use only.
Oh well, guess gotta wait for another few month for newer updates to be able to use another network esim or firmware flashing that can enable this option soon...

x88888x said:
But mine has two IMEI numbers though 1 for physical and another for esim, HOWEVER the esim option to add another QR code for another network is not visible. Its like the device is locked for VERIZON esim use only.
Oh well, guess gotta wait for another few month for newer updates to be able to use another network esim or firmware flashing that can enable this option soon...
Click to expand...
Click to collapse
If your device is the SM-G986U it's a Single SIM Device which doesn't at this point doesn't support eSim. Does the SIM Management Screen actually display the word "eSim"? Share a photo please. The device is likely still locked by Verizon. What is your motivation to change the Firmware to SM-G9860, do you live in Hong Kong?

Im sorry unfortunately I cant post links for my screenshots or upload any pictures..
If your device is the SM-G986U it's a Single SIM Device which doesn't at this point doesn't support eSim. Does the SIM Management Screen actually display the word "eSim"? Share a photo please. The device is likely still locked by Verizon. What is your motivation to change the Firmware to SM-G9860, do you live in Hong Kong?[/QUOTE]
I bought my phone online.. When I start up my phone it says Verizon, but its unlocked though because I can use any country physical simcard. Like right now im using my local simcard in Malaysia. I live in Malaysia and the reason I want to flash rom my SM-G986U device to Hong Kong firmware is so that I can use any eSim network in my country for my other network phone number.... If its a software for eSim that I can get for firmware that will be very helpful. Because the main local Malaysian samsung s20+ 5G firmware model is base on Exynos 990 which I doubt will fit for my US phone model..

I don't think you can flash SM-9860 Firmware onto your device but even if you could you still won't have eSim capability. Mix and matching firmware typically has more success on Exynos International Variants since they are Multi-CSC Enabled Devices. So if you have a British CSC (VOD) you may have success flashing German Firmware (VD2) since both CSC's are already stored in the device however even then some call features may not work. Snapdragon Devices don't have Multi-CSC's and as mentioned previously the Firmware is CSC Specific, they're made for one another. IF you had an Unlocked Bootloader, which you don't, there may be a method to modify the CSC once you root the device.. I did follow a thread a couple of years back where a gal had some success modifying her CSC on a Snapdragon Device but I believe that was a Galaxy S8. Also, I'm still curious if the word "eSim" actually appears in the SIM Management Screen on your device.

varcor said:
I don't think you can flash SM-9860 Firmware onto your device but even if you could you still won't have eSim capability. Mix and matching firmware typically has more success on Exynos International Variants since they are Multi-CSC Enabled Devices. So if you have a British CSC (VOD) you may have success flashing German Firmware (VD2) since both CSC's are already stored in the device however even then some call features may not work. Snapdragon Devices don't have Multi-CSC's and as mentioned previously the Firmware is CSC Specific, they're made for one another. IF you had an Unlocked Bootloader, which you don't, there may be a method to modify the CSC once you root the device.. I did follow a thread a couple of years back where a gal had some success modifying her CSC on a Snapdragon Device but I believe that was a Galaxy S8. Also, I'm still curious if the word "eSim" actually appears in the SIM Management Screen on your device.
Click to expand...
Click to collapse
Damn.. that is some nice insights.. I read a thread somewhere too that US SM-G986U cannot and will not be able to enable its OEM or unlocked bootloader.. the eSim actually doesnt appear in the Sim Management Screen on my device. I really want to upload some links of the screenshot but for now I cant do anything as Im a new member.. I just have to wait for the network shop to open up to change my current esim card to physical simcard.. its been 2 months plus of this coronavirus lockdown and our network providers cant do much about it too..
Anyways I really appreciate the insights, like you said even if I could flash in Hong Kong SM-9860 in to my US SM-G986U, I might run into some software or calls dysfunctionalities..

Anyone got th atct update for the sm-g9880 yet? Seems the u.s has got this update before Asia?

x88888x said:
Damn.. that is some nice insights.. I read a thread somewhere too that US SM-G986U cannot and will not be able to enable its OEM or unlocked bootloader.. the eSim actually doesnt appear in the Sim Management Screen on my device. I really want to upload some links of the screenshot but for now I cant do anything as Im a new member.. I just have to wait for the network shop to open up to change my current esim card to physical simcard.. its been 2 months plus of this coronavirus lockdown and our network providers cant do much about it too..
Anyways I really appreciate the insights, like you said even if I could flash in Hong Kong SM-9860 in to my US SM-G986U, I might run into some software or calls dysfunctionalities..
Click to expand...
Click to collapse
u typically cannot flash hk/china firmware onto us devices bcuz those models r typically oem unlockable and they make sure ppl cant just flash the firmware to a u model and unlock tye bl.. theyre typically signed with dif keys and would most likely fail instantly to flash

elliwigy said:
u typically cannot flash hk/china firmware onto us devices bcuz those models r typically oem unlockable and they make sure ppl cant just flash the firmware to a u model and unlock tye bl.. theyre typically signed with dif keys and would most likely fail instantly to flash
Click to expand...
Click to collapse
Thank you I understand..:crying: now I feel like I wanna sell my Verizon unlocked phone ?

tdevaughn said:
Oh, the Brazil variant. Still dont think it will work. They might be dual sim
Sent from my SM-G988U1 using Tapatalk
Click to expand...
Click to collapse
Do you think i can flash the Korean firmware on the SM G9860 BRI?

iNexusVitto said:
Do you think i can flash the Korean firmware on the SM G9860 BRI?
Click to expand...
Click to collapse
Not possible, the only options are flashing the SM-G9860 China or Hong Kong FW.

eSim on Galaxy S20 5G, SM - G 9810.

I recently got the Galaxy S20 5G, SM - G 9810.
The menu item "eSim" is missing in the SIM card management for the mobile phone.
Thought all S20 can also eSim?
Does anyone have any idea how to get the menu displayed?
Maybe with a different firmware? There is firmware from China on it.
Wanted to run an eSim, SD card and another real Sim in the cell phone.

Zafira30 said:
I recently got the Galaxy S20 5G, SM - G 9810.
The menu item "eSim" is missing in the SIM card management for the mobile phone.
Thought all S20 can also eSim?
Does anyone have any idea how to get the menu displayed?
Maybe with a different firmware? There is firmware from China on it.
Wanted to run an eSim, SD card and another real Sim in the cell phone.
Click to expand...
Click to collapse
You might have the Hong-Kong or Taiwan model which seems to only support physical sim.

west2cool said:
You might have the Hong-Kong or Taiwan model which seems to only support physical sim.
Click to expand...
Click to collapse
There is Chinese firmware on it. maybe you can change it to another firmware. All S20 should have the eSim. Just locked by the software.

Zafira30 said:
There is Chinese firmware on it. maybe you can change it to another firmware. All S20 should have the eSim. Just locked by the software.
Click to expand...
Click to collapse
Go to Setting-About Phone-Software Information and check what it says under Service Provider SW Ver.
TGY - Hong-Kong
BRI - Taiwan
CHC- China

west2cool said:
You might have the Hong-Kong or Taiwan model which seems to only support physical sim.
Click to expand...
Click to collapse
west2cool said:
Go to Setting-About Phone-Software Information and check what it says under Service Provider SW Ver.
TGY - Hong-Kong
BRI - Taiwan
CHC- China
Click to expand...
Click to collapse
The G9810ZCU1ATCT is on the phone.
The G9810ZCU1ATCT is on the phone. Provider software version BRI. If I put another firmware on it, should the eSim work?

Zafira30 said:
The G9810ZCU1ATCT is on the phone.
Click to expand...
Click to collapse
Thats what you looking for.

west2cool said:
Thats what you looking for.
Click to expand...
Click to collapse
The G9810ZCU1ATCT is on the phone.
The G9810ZCU1ATCT is on the phone.
Provider software version BRI.
If I put another firmware on it, should the eSim work?

Zafira30 said:
The G9810ZCU1ATCT is on the phone.
The G9810ZCU1ATCT is on the phone.
Provider software version BRI.
If I put another firmware on it, should the eSim work?
Click to expand...
Click to collapse
I know esim doesn't work on BRI or TGY .

west2cool said:
I know esim doesn't work on BRI or TGY .
Click to expand...
Click to collapse
https://www.sammobile.com/samsung/galaxy-s20/firmware/#SM-G9810

Zafira30 said:
https://www.sammobile.com/samsung/galaxy-s20/firmware/#SM-G9810
Click to expand...
Click to collapse
What you trying to show or say.

https://www.sammobile.com/samsung/g...09tDdu9HNJcp6dBdeNXVf2XpskuEbaUw130w#SM-G9810
These firmware versions are available for the mobile phone.
Which should go?

Zafira30 said:
I recently got the Galaxy S20 5G, SM - G 9810.
The menu item "eSim" is missing in the SIM card management for the mobile phone.
Thought all S20 can also eSim?
Does anyone have any idea how to get the menu displayed?
Maybe with a different firmware? There is firmware from China on it.
Wanted to run an eSim, SD card and another real Sim in the cell phone.
Click to expand...
Click to collapse
You have the S20 Hong Kong Variant. eSim isn't available on your device and changing firmware from TGY, which is the CSC on your device, to a different CSC usually creates more problems than it solves. The Forum is littered with users who have numerous issues after changing firmware. Firmware is CSC specific so altering this compatibility can have adverse effects. Carrier Aggeration, Wifi Calling, Samsung Pay, Samsung Health, Secure Folder as well as your Warranty may be at risk.
Another option if you want to have Dual SIM and SD Card is adding an adapter. I wouldn't consider that since it's a pretty funky setup.
https://www.simore.com/en/dual-sim-adapter-galaxy-s20-ultra-samsung-speed-zx-twin.html
On my Galaxy S8 I shaved a SIM Card, fixed it to the back of my SD Card to facilitate the setup you're hoping to achieve however Samsung squashed that option on S9's and likely S10's and S20's. I'm curious why you feel eSim is vital? It's much easier just to swap out the SD Card with a SIM when Dual SIM is beneficial.

varcor said:
You have the S20 Hong Kong Variant. eSim isn't available on your device and changing firmware from TGY, which is the CSC on your device, to a different CSC usually creates more problems than it solves. The Forum is littered with users who have numerous issues after changing firmware. Firmware is CSC specific so altering this compatibility can have adverse effects. Carrier Aggeration, Wifi Calling, Samsung Pay, Samsung Health, Secure Folder as well as your Warranty may be at risk.
Another option if you want to have Dual SIM and SD Card is adding an adapter. I wouldn't consider that since it's a pretty funky setup.
https://www.simore.com/en/dual-sim-adapter-galaxy-s20-ultra-samsung-speed-zx-twin.html
On my Galaxy S8 I shaved a SIM Card, fixed it to the back of my SD Card to facilitate the setup you're hoping to achieve however Samsung squashed that option on S9's and likely S10's and S20's. I'm curious why you feel eSim is vital? It's much easier just to swap out the SD Card with a SIM when Dual SIM is beneficial.
Click to expand...
Click to collapse
Which S20 Snapdragon variant can support Nano Sim + eSim + Micro SD? I thought the HK version could do that and was about to buy.

Sharpshooterrr said:
Which S20 Snapdragon variant can support Nano Sim + eSim + Micro SD? I thought the HK version could do that and was about to buy.
Click to expand...
Click to collapse
According to Samsung Support, which I would take with a grain of salt, a future update may enable eSim on Snapdragon Devices. The Snapdragon 855 SOC is compatible with eSim as evidenced on the Galaxy Fold and I would think the 865 SOC on the S20's is as well, however at this time I'm not aware of any eSim enabled S20's with Snapdragon SOC's.

Zafira30 said:
There is Chinese firmware on it. maybe you can change it to another firmware. All S20 should have the eSim. Just locked by the software.
Click to expand...
Click to collapse
Hi dear, My S20 is japanese AU firmware. my phone also doesn't showing e-sim option.
west2cool said:
Go to Setting-About Phone-Software Information and check what it says under Service Provider SW Ver.
TGY - Hong-Kong
BRI - Taiwan
CHC- China
Click to expand...
Click to collapse
my phone says: SCG01_jp_kdi
Will it support e sim?
can't find e-sim option in my phone

Zafira30 said:
There is Chinese firmware on it. maybe you can change it to another firmware. All S20 should have the eSim. Just locked by the software.
Click to expand...
Click to collapse
Mine is S20 5G SM-G981J japanese au version phone. my device is not showing esim option.
can you tell my device is esim supported or not

Enable eSIM feature on Samsung S20+ SM-G986W

Hello Experts,
I have a Samsung Galaxy S20+ 5G purchased in Canada and not associated with any service provider. I am planning to use it in India and I have 2 SIM's in India. Samsung Canada Firmware does not have eSIM feature and there is no SIM Card Manager function in settings. Can I flash any other region firmware and have the eSIM feature enabled ?

The question should b e, does the snapdragon variant support e-sim, cos am stuck with a S20 +5g purchased in usa but no e-sim

Galaxy devices in India are typically Exynos variants which offer eSIM functionality. Flashing different firmware on a Galaxy S Series Snapdragon variant won't enable eSIM. None of Galaxy's Snapdragon variants except The Fold are eSIM capable.

phrozenwire said:
Hello Experts,
I have a Samsung Galaxy S20+ 5G purchased in Canada and not associated with any service provider. I am planning to use it in India and I have 2 SIM's in India. Samsung Canada Firmware does not have eSIM feature and there is no SIM Card Manager function in settings. Can I flash any other region firmware and have the eSIM feature enabled ?
Click to expand...
Click to collapse
Hi I have a same model Canadian S20+ 5G , G986W , I'm from india can u plssss help to enable LTE+ , it's shows only LTE , how to enable LTE+ ???

I would like to know how to enable esim in
СМ-G986W as well. Maybe by changing region or something else ​

Hi guys, I finally got rid of my G986W. I've converted it to G986U1:
Firmware: https://samfw.com/firmware/SM-G986U1/TMB/G986U1UES3GWA2
SAMFW Odin Flash: https://samfw.com/blog/samfw-frp-tool-1-0-remove-samsung-frp-one-click
Just flash firmware with included Odin Flash (Add all files except HOME_CSC and don't use USERDATA.
I've flashed and my S20+ reborn as a true phone with eSim functionality and etc.

0x0null said:
The question should b e, does the snapdragon variant support e-sim, cos am stuck with a S20 +5g purchased in usa but no e-sim
Click to expand...
Click to collapse
It does, bit esim is disabled in Canada, by soft. Instal U1(xaa) instead of W soft, esim will be enabled.

Have u tried installing a Esim? Is it working fully?
MGoris said:
Hi guys, I finally got rid of my G986W. I've converted it to G986U1:
Firmware: https://samfw.com/firmware/SM-G986U1/TMB/G986U1UES3GWA2
SAMFW Odin Flash: https://samfw.com/blog/samfw-frp-tool-1-0-remove-samsung-frp-one-click
Just flash firmware with included Odin Flash (Add all files except HOME_CSC and don't use USERDATA.
I've flashed and my S20+ reborn as a true phone with eSim functionality and etc.
Click to expand...
Click to collapse

Sureshtuty said:
Have u tried installing a Esim? Is it working fully?
Click to expand...
Click to collapse
Works without any problems, especially since I'm in Europe.

0x0null said:
The question should b e, does the snapdragon variant support e-sim, cos am stuck with a S20 +5g purchased in usa but no e-sim
Click to expand...
Click to collapse
all s20+ 5g should support esim. (esim is inegrated to a snapdragon chip) BUT some of them are dissabled by software. but such a models like 986U or 986V, for example, were lock by operator and you could not install a software from U1, that includes esim support. i might be wrong. i installed U1 soft to a 986W model (that was without esim support. Now, esim works perfect. s20+ updates online. samsung pay works correct, knox works as well)

RR0077 said:
all s20+ 5g should support esim. (esim is inegrated to a snapdragon chip) BUT some of them are dissabled by software. but such a models like 986U or 986V, for example, were lock by operator and you could not install a software from U1, that includes esim support. i might be wrong. i installed U1 soft to a 986W model (that was without esim support. Now, esim works perfect. s20+ updates online. samsung pay works correct, knox works as well)
Click to expand...
Click to collapse
I have Lost 2nd Physical sim option after update to OneUI 5.1, on my 988B, before the update i was using both physical sims ok. Now only 1 physical sim and 1 eSim option is there. Please help

I am trying to flash a U1 firmware. I keep getting Fail (Auth) on Odin. I'm using a patched ver 3.14.1 of Odin.
I've selected USB debugging on my phone. What am I missing?
Can anyone help?

note 10+ n975u need help to use in other country

Hi guys,
sorry for noob question..
my s10+ is a n975U carrier sprint USA unlock but somehow i cannot use in malaysia
i already check the imei is clean from blacklisted..
should i check with malaysia IMEI or flash it ?

AlexSipenglipurlara said:
Hi guys,
sorry for noob question..
my s10+ is a n975U carrier sprint USA unlock but somehow i cannot use in malaysia
i already check the imei is clean from blacklisted..
should i check with malaysia IMEI or flash it ?
Click to expand...
Click to collapse
First I try to repeat what I understood so far: You have a Note 10+ US version with locked bootloader which should be network unlocked from Sprint.
So you should be able to use a SIM card of a different service provider.
Does the device recognize the SIM card?
What exactly does not work?
Maybe it is just an incompatibility with special bands (LTE/4G, 5G).