[T-Mobile LG V10 Android Development] PramodJT:
I tried different SD cards, my phone would respond with all SD cards exactly after 10mins. I currently use 64GB Samsung SDXC UHS-I type card which has 80Mbps read speed. This thread was created for the the sole purpose of un-bricking H901 using SD card. So, there is no reason for the phone to respond 10 mins late. Qualcomm boards are built to run on eMMC as well as SD cards. They are similar to Dragon boards and Beaglebone boards. They all run on eMMC as well as SD card, there won't be much difference in booting time between the two.

I have seen posts in androidcentral, people flashed disk images to SD cards and used them to run the phone for normal use. They however got their phones working without SD card after an OTA update. That is how my phone works now (no lagging issues, can run all apps without lag). I didn't get the OTA update because it shows a wrong model in its hardware-info-page in settings. I doubt the local service guy messed up my phone when I gave it for service.

This is not possible if, like you said, the speed difference between eMMC and SD card. They get the download mode in seconds using SD card, my phone doesn't. So I assumed eMMC is fried coz of some unknown reason and the phone keeps trying it for 10mins and then try booting from SD card (I say it is fried because of the checksum difference I get while flashing partitions using QFIL, I would require few partitions like aboot, boot, etc. just to get the LG logo screen. But this doesn't happen in my case). One of the XDA developer says that the phone would look for partitions in eMMC by default. If they are corrupt, it would check for the same in SD card and would use it for booting. One more thing is, I successfully flashed my phone using LGUP by making my phone get into download mode using the disk image in SD card. I flashed the right image, but the phone doesn't boot without SD card. This is another reason why I think my eMMC is fried and phone keeps checking it for partitions for 10 mins and later decides to run using SD card.

As far as the rawprogram.xml is concerned, I modified the one I downloaded which is for H901. I used eMMC RAW tool to get the partition's start address and size right. I have attached the screenshot, please check it. One more screenshot is attached which shows partitions extracted using LG firmware extract tool. The number in the filename of each partition is the starting sector. I had a problem modifying the location for backupGPT as in eMMC RAW tool, both primary and backup GPT are shown as one and using the LG firmware extract tool, I get them separately. However we don't have to flash the primary and backup GPT unless the partition table is messed up. I will upload the xml file if you want to check it. I modified the xml, as this is not available online for H961N. Nobody from XDA is responding questions asked about LG-H961N-dual sim recently. :(

I am stuck with the phone running with SD card with only one sim active. If I restart my phone I get the LG logo screen after 10mins. But the phone works fine and all apps run fast. I still see a wrong model displayed in its hardware info settings. I checked the build.prop file in system partition. It shows the correct model. Need help with this. :crying: