A hypothesis, all of the RED Hydrogen One are dual SIM - RED Hydrogen One Guides, News, & Discussion

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I brought a secondhand RED (Verizon version) on second hand market Xianyu闲鱼 ( Like eBay or mercari メルカリ) , less than USD100.
Then I updated the RED Hydrogen One to android 9 via fastboot and found dual sim in settings.
But merchantmen has told me it was a single sim version, and the dual sim version is more expensive (over USD 200) because is rare.
I cut my SIM card and let it fit to the second slot (used to settle TFcard) , then it recognized as a SIM card and can get signal, just like a DSDS one.
The hypothesis is , every RED Hydrogen One has the same motherboard, no matter you are aluminum version or titanium version, no matter sim free or carrier limited.
I won’t use Chinese because I don’t wanna shock greedy merchants , they import this mobile phone in same price , but sold them differently.
I will upload the dual sim android 9 ROM later. And how to install? Just refer posts written by other people posted on XDA.
By the way, root this phone can be more easier, just get its boot.img and transfer to your phone, let your magisk manager to patch it, then swap it as a boot to your phone.

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A problem : this ROM doesn’t support VoLTE of China telecom. Even though it shows VoLTE enabled. You will lost your internet connection while calling , voice will on 1xRTT instead of LTE.

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It also has few languages in settings, for example, traditional Chinese only for Taiwan, no Hong Kong .

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I Have a Globle Build
I have a global build on my Red. Its work with Dual Sim. LTE works perfectly with only issue it doesn't save any Call logs. Except this the phone works on all front.

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114514Beast said:
View attachment 5081633View attachment 5081635
I brought a secondhand RED (Verizon version) on second hand market Xianyu闲鱼 ( Like eBay or mercari メルカリ) , less than USD100.
Then I updated the RED Hydrogen One to android 9 via fastboot and found dual sim in settings.
But merchantmen has told me it was a single sim version, and the dual sim version is more expensive (over USD 200) because is rare.
I cut my SIM card and let it fit to the second slot (used to settle TFcard) , then it recognized as a SIM card and can get signal, just like a DSDS one.
The hypothesis is , every RED Hydrogen One has the same motherboard, no matter you are aluminum version or titanium version, no matter sim free or carrier limited.
I won’t use Chinese because I don’t wanna shock greedy merchants , they import this mobile phone in same price , but sold them differently.
I will upload the dual sim android 9 ROM later. And how to install? Just refer posts written by other people posted on XDA.
By the way, root this phone can be more easier, just get its boot.img and transfer to your phone, let your magisk manager to patch it, then swap it as a boot to your phone.
Click to expand...
Click to collapse
Hello! can you tell the size of the file that you have flashed into the device using fastboot commands? my search didn’t lead to android version 9 success !!!! do you have the ability to upload a file or provide a link? thank

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REPLY
sansara_2001 said:
Hello! can you tell the size of the file that you have flashed into the device using fastboot commands? my search didn’t lead to android version 9 success !!!! do you have the ability to upload a file or provide a link? thank
Click to expand...
Click to collapse
44.5MB magisk_patched
It's a boot image
I uploaded to Google drive.
Here is link
https://drive.google.com/file/d/1dDnBaVdAePh0cvNVXQAu538bMoL5s83h/view?usp=sharing

---

Android 9 ROM package
ATTENTION: IT WILL WIPE ALL OF YOUR USER DATA
https://drive.google.com/file/d/1FvuqfC28e7tmVGjGDgCZixVpATKtT2sB/view?usp=sharing

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114514Beast said:
Android 9 ROM package
ATTENTION: IT WILL WIPE ALL OF YOUR USER DATA
https://drive.google.com/file/d/1FvuqfC28e7tmVGjGDgCZixVpATKtT2sB/view?usp=sharing
Click to expand...
Click to collapse
Thank you so much. data reset is a common situation.
Does your fingerprint scanner work after this firmware? I have not tested it yet, but I have a second phone with two working sims and it has problems with the fingerprint scanner. judging by the locked bootloader, I have a rare international version.

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114514Beast said:
Android 9 ROM package
ATTENTION: IT WILL WIPE ALL OF YOUR USER DATA
https://drive.google.com/file/d/1FvuqfC28e7tmVGjGDgCZixVpATKtT2sB/view?usp=sharing
Click to expand...
Click to collapse
Greetings. Finally, the version for verizon has arrived. i will try to flash 9 android. The question arose, is it useful for a modified boot for rutting?
Can I flash the image right away? and I see two executables, could you please indicate which one you were flashing?
flash_a2h_windows.bat
flash_a2h_keep_userdata_windows.bat
I have a suspicion that one is doing a complete cleaning, and the second is flashing the image without cleaning.
thank

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Flashed today the Android 9 Firmware on this thread on Verizon Hydrogen One and it's working perfect.
Finally Android 9 and finally debranded, plus the dual sim support (which i have not tested).
The steps i've followed are:
-Enable debugging options and then, OEM Unlock.
-Reboot to Fastboot (with power and vol -) and unlock bootloader with "fastboot flashing unlock" , confirm with power and vol buttons on the phone, then let it reboot and unlock again "fastboot flashing unlock_critical".
-Flash the firmware with "flash_a2h_windows.bat" it will take about 10-15m depending your pc. Also notice that i have installed adb and fastboot system-wide.
-In my case, once it finished flashing, the phone turned off, so i turned on and let it boot.
-Because i dont need magisk or root, in fastboot mode i relocked the bootloader with "fastboot flashing lock" and once rebooted "fastboot flashing lock_critical", both times confirming with power and vol buttons on the phone to relock bootloader.
Tested 4V functions, speakers, calls, sms, 4G, nfc, bt transfer and audio and pretty much all the sensors and everything seems to work fine.
PS: My backup from Google Drive didn't work for me because somehow this firmware changes some kind of hardware id and it's recognized by Google Services as a different phone.

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enekolo13 said:
Flashed today the Android 9 Firmware on this thread on Verizon Hydrogen One and it's working perfect.
Finally Android 9 and finally debranded, plus the dual sim support (which i have not tested).
The steps i've followed are:
-Enable debugging options and then, OEM Unlock.
-Reboot to Fastboot (with power and vol -) and unlock bootloader with "fastboot flashing unlock" , confirm with power and vol buttons on the phone, then let it reboot and unlock again "fastboot flashing unlock_critical".
-Flash the firmware with "flash_a2h_windows.bat" it will take about 10-15m depending your pc. Also notice that i have installed adb and fastboot system-wide.
-In my case, once it finished flashing, the phone turned off, so i turned on and let it boot.
-Because i dont need magisk or root, in fastboot mode i relocked the bootloader with "fastboot flashing lock" and once rebooted "fastboot flashing lock_critical", both times confirming with power and vol buttons on the phone to relock bootloader.
Tested 4V functions, speakers, calls, sms, 4G, nfc, bt transfer and audio and pretty much all the sensors and everything seems to work fine.
PS: My backup from Google Drive didn't work for me because somehow this firmware changes some kind of hardware id and it's recognized by Google Services as a different phone.
Click to expand...
Click to collapse
Hello, do you know if this works for any H1A100 or is it only for the Verizon ones?

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cicc98 said:
Hello, do you know if this works for any H1A100 or is it only for the Verizon ones?
Click to expand...
Click to collapse
verizon and ATT - OK!

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sansara_2001 said:
verizon and ATT - OK!
Click to expand...
Click to collapse
Thanks, I bought mine from a company called Telcel in Mexico. I suppose it is an international unlocked variant, do you think it will also work?
Also, has anyone tried one of the Project Treble ROMs?

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114514Beast said:
RESPUESTA
44,5 MB Magisk_patched
Es una imagen de arranque
Subí a Google Drive.
Aquí está el enlace
https://drive.google.com/file/d/1dDnBaVdAePh0cvNVXQAu538bMoL5s83h/view?usp=sharing
Click to expand...
Click to collapse
Disculpe para que funciona y como soluciono el problema de las fallas de audio en Android 9 para Red Hydrogen One
Mod translation
114514Beast said:
REPLY
44.5 MB Magisk_patched
It's a boot image
I uploaded to Google Drive.
Here is the link
https://drive.google.com/file/d/1dDnBaVdAePh0cvNVXQAu538bMoL5s83h/view?usp=sharing
Click to expand...
Click to collapse
Sorry, what does it work for and how do I fix the audio glitches in Android 9 for Red Hydrogen One?

---

114514Beast said:
Android 9 ROM package
ATTENTION: IT WILL WIPE ALL OF YOUR USER DATA
https://drive.google.com/file/d/1FvuqfC28e7tmVGjGDgCZixVpATKtT2sB/view?usp=sharing
Click to expand...
Click to collapse
this works so much better than before. thanks would you happen to have TWRP on hand?

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sansara_2001 said:
verizon and ATT - OK!
Click to expand...
Click to collapse
Just to confirm before I go this path - did you test the dualSIM capability on AT&T please? Mobile hotspot too?
cicc98 said:
Thanks, I bought mine from a company called Telcel in Mexico. I suppose it is an international unlocked variant, do you think it will also work?
Also, has anyone tried one of the Project Treble ROMs?
Click to expand...
Click to collapse
Also curious what other ROMs pleaple tested and can confirm as fully working.
It would be nice to have a rooted dualSIM phone

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Thank you all who contributed, shared in the thread.
AT&T is now dual sim! So far no problems noted, but will report if any.

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Ok, I think I lost root - I know I had it for sure in Android 8.1, but after upgrading to Android 9 I don't have it.
Any ideas how to get root again please?

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PsychoticGaming said:
I Have a Globle Build
I have a global build on my Red. Its work with Dual Sim. LTE works perfectly with only issue it doesn't save any Call logs. Except this the phone works on all front.
Click to expand...
Click to collapse
I need QCN file for this device, plz.
I will be grateful for you if u send it to me. [email protected]

---

114514Beast said:
View attachment 5081633View attachment 5081635
I brought a secondhand RED (Verizon version) on second hand market Xianyu闲鱼 ( Like eBay or mercari メルカリ) , less than USD100.
Then I updated the RED Hydrogen One to android 9 via fastboot and found dual sim in settings.
But merchantmen has told me it was a single sim version, and the dual sim version is more expensive (over USD 200) because is rare.
I cut my SIM card and let it fit to the second slot (used to settle TFcard) , then it recognized as a SIM card and can get signal, just like a DSDS one.
The hypothesis is , every RED Hydrogen One has the same motherboard, no matter you are aluminum version or titanium version, no matter sim free or carrier limited.
I won’t use Chinese because I don’t wanna shock greedy merchants , they import this mobile phone in same price , but sold them differently.
I will upload the dual sim android 9 ROM later. And how to install? Just refer posts written by other people posted on XDA.
By the way, root this phone can be more easier, just get its boot.img and transfer to your phone, let your magisk manager to patch it, then swap it as a boot to your phone.
Click to expand...
Click to collapse
I need a dump for modemst1 and modmest2 files plz.