How to unlock bootloader Easy on New unisoc Devices (T7510)
💡 Learn how to unlock bootloader on the latest Unisoc (T7510) devices using two effective methods! Whether you’re using a custom token or private key, this step-by-step guide makes the process simple, safe, and beginner-friendly—no advanced skills required.
Instructions unlock bootloader
Step 1: overwrite stack to execute FDL1 without verfication
Use custom_exec_no_verify_3f88.bin to replace the stack if the device entered download mode by holding a specified button during startup (usually volume down).
Use custom_exec_no_verify_3f28.bin to replace the stack if the device entered download mode after all efforts to boot failed (for example, if the splloader was deleted and no key was hit).
Make custom_exec.bin in accordance with BootROM for more Socs affected by CVE-2022-38694.
Step 2: Modify FDL1
Patch 1: NOP(1F 20 03 D5) verfication in data_exec.
Patch 2: change download mode (0x102)(40 20 80 52) to boot mode(0x104)(80 20 80 52).
- Apply patch 1 to original FDL1, save as fdl1-dl.bin.
- Apply patch 1 and patch 2 to original FDL1, save as fdl1-boot.bin.
Using FDL1 from a different model (same Soc) appears secure. Unfortunately, only in download mode. Device-specific fdl1 is required to unlock the bootloader. If your manufacturer won’t provide fdl1, you can compile it yourself (you’ll need to modify some ddr init code to work with splloader).
Here is pre patched unlock tool for some devices
Step 3: Modify FDL2(uboot)
Patch 1: patch do_cboot.
search for VerifiedBoot-UNLOCK to find set_lock_status.
search for 0x32121BAC or 0x1BAC (T7510 specific address ?), and reboot_devices starts with CMP W0,#3 CMP W0,#4 CMP W0,#2.
search for enter boot mode to find do_cboot, patch it to call set_lock_status and reboot_devices.
Patch 2 : NOP write check of secure partitions.
Like fdl1, uboot for unlocking bootloader (boot mode) must be device-specific as well. However, you can use another model (same Soc) uboot in download mode to read_part your device uboot
Part 4: get trustos images list and load address from splloader
get splloader by read_part
The list and address are easy to get, since _start calls reset, reset calls nand_boot, nand_boot will load images from emmc/ufs to memory and boot.
| device | model | android | sml | teecfg | tos |
|---|---|---|---|---|---|
| tyyh2020 | ud710_20c10 | 9 | 0x94000000 | no need | 0x94040000 |
| tyyh2021 | ud710_7h10 | 10 | 0x94000000 | 0x94020000 | 0x94040000 |
| Hisense A7 | ud710_2h10 | 10 | 0x94000000 | 0x94020000 | 0x94040000 |
Misc: you need to know correct partition size to read_part, this can be done by read_part user_partition 0 17K efi_part.img(It works for emmc, I don’t know about ufs). Open efi_part.img in WinHex.
Prepare unlock command
1: send fdl1-dl.bin, send uboot, read_part trustos images and chsize these images
2: send fdl1-boot.bin, send modified uboot with trustos images, sml must be the last one sent to device.
3: erase userdata, use one of download/fastboot/recovery (If your userdata use f2fs format, you can take the userdata.bin from tyyh branch).
Here is command that can be used with SPD_dump (must replaced with your own data)
Read Part:
spd_dump fdl fdl1-dl.bin 0x5500 fdl fdl2-dl.bin 0x9efffe00 exec read_part splloader 0 1m spl.bin read_part uboot_a 0 3m uboot.bin erase_part splloader reset
Write part
spd_dump fdl fdl1-dl.bin 0x5500 fdl fdl2-dl.bin 0x9efffe00 exec write_part uboot_a fdl2-cboot.bin write_part uboot_b fdl2-cboot.bin resetspd_dump fdl fdl1-dl.bin 0x5500 fdl fdl2-dl.bin 0x9efffe00 exec write_part splloader spl.bin write_part uboot_a uboot.bin write_part uboot_b uboot.bin reset
Method 2:
Spreadtrum / Unisoc Bootloader Unlock Tool – 2025 Update
This tool is designed to simplify unlocking bootloaders for Spreadtrum/Unisoc devices, including a range of supported models like the Redmi 12C, Note 12 5G, and more. In this article, we will guide you step-by-step on how to use the tool and how it can assist in unlocking devices efficiently.
With the latest updates, this tool has been enhanced for better performance and stability. Additionally, you can now use it with Android 15 and 16 versions as well as devices running newer security patches, ensuring a smooth unlocking experience.
Spreadtrum / Unisoc Bootloader Unlock Tool
Device status: Disconnected
Made by Iscle
Based on fastboot.js
⚡ تنبيه قانوني | Legal Notice:
This tutorial is intended for educational purposes only. We do not endorse or support any illegal activities. Therefore, always ensure that you have the legal right to unlock and modify your device before proceeding with any FRP bypass or account unlocking methods.
هذا الدرس لأغراض تعليمية فقط. نحن لا نؤيد أو ندعم أي أنشطة غير قانونية. تأكد دائمًا من أنك تملك الحق القانوني في فتح وتعديل جهازك قبل المتابعة في أي طرق لتخطي حساب جوجل أو فتح الحسابات.
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