[Tutorial] How to use Research Download tool to backup Unisoc (Spreadtrum) firmware
[Tutorial] How to use Research Download tool to backup Unisoc (Spreadtrum) firmware
Follow the steps below to backup Unisoc / Spreadtrum ROM with Research Download tool
See the video below or @ https://www.youtube.com/watch?v=RHNeLCITJkoQuote:In this video tutorial, I'll be explaining
how to use Research Download tool to backup
a Spreadtrum device's firmware.
Apologies about my voice, I have a cold so
sorry about that.
You're going to need Research Download tool,
I'll link to that in the description below.
You're also going to need to have installed
your Spreadtrum USB drivers, I'll also link
to that and you're going to need the pac file
for your phone model.
The question is, If you already have a pac
file for your model, why do you then need
to backup.
Well, the answer is that the pac file you
have might not be for your exact variant (build
number).
What you really need is the FDL 1&2 from the
pac file.
If you have that (these) then you don't need
the pac file but if you don't have then you'll
have to download a pac file for your model.
Now, once you have your Research Download
tool, drivers and a firmware (.pac file) for
your model (not compulsorily your build number),
you launch Research Download tool and you
wait for it to come up.
Now, once it comes up, you're going to load
the pac file which you have for your phone
model.
You click on Load Packet, highlight the pac
file then click on Open.
Now, you wait while the pac file gets loaded.
You're going to see blue boxes starting from
one then all the way to this point.
When that happens then you're ready to proceed
so you have to wait till that is done.
Once that is done, you're going to have something
like this.
From this point, its very straightforward.
You click Settings and under Main page, you
untick (uncheck) everything except FDL 1&2
and maybe one harmless partition like boot
logo.
Now, for the backup proper.
You come under Flash Operations.
Tick Active Read Flash then you can select
all partitions you intend to flash (*backup).
For me, I'll just select (let's say) prodnv
and recovery just for this guide and click
OK.
Once you do that, you click on this button
which is Start Downloading.
At this point, you power off the device, still
with battery in it, you hold the boot key.
For Spreadtrum, it could be volume down or
volume up depending on your Spreadtrum device.
Mine is volume down.
You hold it down then connect it to the PC
via a USB cable.
Wait for detection.
Once that starts, backup proper should begin.
Alright, so that is done.
You can head over to the Research Download
tool folder, ReadFlash folder and you're going
to find whatever files you've backed up.
These are files I'd previously backed up.
That's how to backup a Spreadtrum Android
device's firmware (pac file) using Research
Download tool.
If you got stuck at any point in this guide
then ensure to drop your comment(s) below
and we'll be happy to assist you.
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(15-01-2020, 06:51 PM)Canary Dhnks, it helpful, but how will i flash the nv data prodnvbacked up to phone
Sent from my Infinix X603 using Tapatalk
(01-04-2020, 05:50 PM)shankar1790 I tried to backup my sc9832a device with this tool and it successfully backup partition i selected except uboot and splloader.
with error message img size over its partition.
BUT the backup file has large in size than origional one.like my origional nvitem.bin size is 442k but the backup file approx 1MB in size.
when it tried to flash in same phone to see if it work or no, its failed with error "img size over its partition"
is this a tool error or problem with device
any solution.
do i need a separate thread for this
(09-02-2021, 08:51 PM)yossi66a Thanks very much for the such "rich" information given!!
I'm trying to create backup of firmware files for the Nokia 225 Chipset UMS9117, i have the Pac file and its supported on this tool as its possible to download the firmware to the phone, but when i try to backup partitions it gives me empty file partitions, please if someone can help me!
Thanks
(01-04-2020, 05:50 PM)shankar1790 I tried to backup my sc9832a device with this tool and it successfully backup partition i selected except uboot and splloader.
with error message img size over its partition.
BUT the backup file has large in size than origional one.like my origional nvitem.bin size is 442k but the backup file approx 1MB in size.
when it tried to flash in same phone to see if it work or no, its failed with error "img size over its partition"
is this a tool error or problem with device
any solution.
do i need a separate thread for this
(21-03-2021, 11:38 PM)getoverwith just compare and edit your nvtem.bin from your backup to the nvtem.bin from the stock rom for your model, downloaded from internet. Compare using HexEditor. Your backup nvtem.bin contains more 0000000000, so it is larger in size. In HexEditor edit your backup nvtem.bin so it ends in the same way as the nvtemb.bin from stockrom, namely trim unnecessary 00000000 to reduce the size and then save. I did so and my edited backup nvtem.bin flashed with Research Download without previous error IMG SIZE OVER ITS PARTITION.At 2:15 of this video https://youtu.be/M_hHEMo158U, a guy fills in the contents of the "Active read Flash" with the values of the "Base1" and "Size1" columns from the UpgradeDownload tool. I tested this for a partition that was in error and it works. However, I did not go any further.