Unlocked A9 with Marshmallow, How to go about installing Nougat

[pankajupadhyay05]

I bought an HTC One A9 from eBay.in and the seller said it's AT&T unlocked variant. It supports VoLTE and is currently showing software number 1.57.617.20 in About >> Software information. If Sprint is a CDMA only network, then the seller is right or else he might be confused as I found Sprint sim while unboxing.

Anyways, my concern is to get the Nougat update on this device. For that, I need to know how to proceed further since I have no idea whether it's from AT&T or Sprint. Which ROM should I use and how? Apologies for being naive, but I need you people help to identify and guide me on installing the correct Nougat ROM on my device. Thanks

P.S. There is a software update for my device with number 1.57.617.32 but I couldn't install it because it gives me "variant system version" error.

 

[alray]

I bought an HTC One A9 from eBay.in and the seller said it's AT&T unlocked variant. It supports VoLTE and is currently showing software number 1.57.617.20 in About >> Software information. If Sprint is a CDMA only network, then the seller is right or else he might be confused as I found Sprint sim while unboxing.

Anyways, my concern is to get the Nougat update on this device. For that, I need to know how to proceed further since I have no idea whether it's from AT&T or Sprint. Which ROM should I use and how? Apologies for being naive, but I need you people help to identify and guide me on installing the correct Nougat ROM on my device. Thanks

P.S. There is a software update for my device with number 1.57.617.32 but I couldn't install it because it gives me "variant system version" error.

"Variant system version" mean that the OTA update detected that your MID # doesn't match the expected MID the ota update was made for. I'm 99.9% sure that your phone is a Sprint A9 that was badly converted to AT&T. Check info in bootloader mode and check your "fastboot getvar all" output.

 

[pankajupadhyay05]

"Variant system version" mean that the OTA update detected that your MID # doesn't match the expected MID the ota update was made for. I'm 99.9% sure that your phone is a Sprint A9 that was badly converted to AT&T. Check info in bootloader mode and check your "fastboot getvar all" output.

My MID is 2PQ912000 and CID is 11111111. Currently, I am running 1.57.617.20. Can I update to 2.18.617.10 RUU mentioned in this RUU Collection post.

Also, somewhere I read that if you have SuperCID, you can flash any RUU from any region or carrier, is it true? If it's true I will search the internet for Indian unlocked variant Nougat RUU over the internet.

 

[alray]

My MID is 2PQ912000

Just to be sure, you've got this information using fastboot not from any kind of "CID getter" app? What is your phone variant when you boot in download mode?

Can I update to 2.18.617.10 RUU mentioned in this RUU Collection post

You'll need to update your firmware first, see FAQ at post #2

Also, somewhere I read that if you have SuperCID, you can flash any RUU from any region or carrier, is it true? If it's true I will search the internet for Indian unlocked variant Nougat RUU over the internet.

Your MID must also be compatible with the RUU.

 

[pankajupadhyay05]

Just to be sure, you've got this information using fastboot not from any kind of "CID getter" app? What is your phone variant when you boot in download mode?


You'll need to update your firmware first, see FAQ at post #2


Your MID must also be compatible with the RUU.

I got this information from fastboot. By pressing volume down and power button. Didn't use any app. If it's safe I will proceed with the SD card method. Since the latest one doesn't have a zip variant , will use the second one .1 RUU and firmware

 

[pankajupadhyay05]

Waiting for your answer @alray

 

[pankajupadhyay05]

I forgot to mention that in download mode it says "locked" between arsterik on the top. Should I proceed with flashing or not

 

[alray]

I forgot to mention that in download mode it says "locked" between arsterik on the top. Should I proceed with flashing or not

Yes go for it. Bootloader locked is fine

 

[pankajupadhyay05]

Yes go for it. Bootloader locked is fine

Thanks for your time mate. Will try and update on this thread.

 

[pankajupadhyay05]

Yes go for it. Bootloader locked is fine

Tried to flash firmware first but got the fail 12 error - 12 RU_ZIP_ERROR. Following is what i tried:

Copied the firmware zip to sd card and then renamed it to "2PQ9IMG.zip". Booted in download and tried to flash before getting the above error.