{"id":13001,"date":"2025-03-06T09:40:11","date_gmt":"2025-03-06T09:40:11","guid":{"rendered":"https:\/\/www.hovatek.com\/blog\/?p=13001"},"modified":"2026-08-02T16:49:07","modified_gmt":"2026-08-02T16:49:07","slug":"my-experience-unbricking-a-dead-boot-tecno-pop-7-pro-bf7","status":"publish","type":"post","link":"https:\/\/www.hovatek.com\/blog\/my-experience-unbricking-a-dead-boot-tecno-pop-7-pro-bf7\/","title":{"rendered":"My Experience unbricking a dead boot Tecno Pop 7 Pro (BF7)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The device was MediaTek MT6761-powered and running on Android 12 (HiOS). Its build number was BF7-H6127ABCDSTUAdAeAfArAs-S-GL-230719V1237 (this information wasn&#8217;t crucial for unbricking although it&#8217;s good to always note your software information). <\/p>\n\n\n\n<h4 class=\"wp-block-heading\">How it got bricked<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Its firmware was first <a href=\"https:\/\/www.hovatek.com\/forum\/thread-47475.html\">dumped using Hydra Tool<\/a> then its <a href=\"https:\/\/www.hovatek.com\/forum\/thread-19578.html\">bootloader was unlocked via fastboot<\/a> (required logging into Tecno ID to enable OEM unlocking) and rooted with <a href=\"https:\/\/www.hovatek.com\/forum\/thread-21427.html\">Magisk Manager<\/a>. This unfortunately caused Wi-Fi &amp; Bluetooth to stop working (couldn&#8217;t be turned on). The microphone also stopped functioning during phone calls although it worked fine when using the voice recorder and apps like WhatsApp and Telegram.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The boot.img from the firmware was flashed back (to unroot) but same issue. The boot.img and preloader from the dump were then flashed and this caused the device to get stuck in <a href=\"https:\/\/www.hovatek.com\/blog\/how-to-force-a-mediatek-device-into-brom-mode\/\">BROM Mode<\/a>. It wasn&#8217;t detected by the PC anymore after a while.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">The approach<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">While we have a collection of <a href=\"https:\/\/www.hovatek.com\/forum\/thread-23243.html\">DA and Auth. files for Tecno<\/a> devices and a guide on <a href=\"https:\/\/www.hovatek.com\/forum\/thread-46342.html\">using SP Flash tool + MTKClient<\/a> to flash secure boot devices, recent Transsion models like this tend to require an Auth. (local or remote), Preloader Auth. like you would find in paid tools or Carlcare Official Flash Tool. I chose MTKClient (which is a free tool)<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">The Fix<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>python mtk.py payload<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The objective was simple, flash back the right Preloader to the device. This wasn&#8217;t possible using SP flash tool after running the above command because it gave a <strong>DA Hash<\/strong> error. Errors in MTKClient caused the <a href=\"https:\/\/www.hovatek.com\/forum\/thread-808.html\">USB device not recognized<\/a> error which only disappeared after leaving the device&#8217;s battery to drain completely (you could disassemble and unplug then re-plug the battery to save time).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I then grabbed the Preloader (preloader_bf7_h6127.bin) from the factory firmware and pasted it into the MTKClient folder and ran the command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>python mtk.py w preloader preloader_bf7_h6127.bin --parttype boot1 --preloader=preloader_bf7_h6127.bin<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">I then held both Volume buttons + Power button and connected (this is only necessary when coming from a drained battery state and not required for a device stuck in BROM Mode).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This was the MTKClient log:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>..Port - Device detected :)\nPreloader -     CPU:                    MT6761\/MT6762\/MT3369\/MT8766B(Helio A20\/P22\/A22\/A25\/G25)\nPreloader -     HW version:             0x0\nPreloader -     WDT:                    0x10007000\nPreloader -     Uart:                   0x11002000\nPreloader -     Brom payload addr:      0x100a00\nPreloader -     DA payload addr:        0x201000\nPreloader -     CQ_DMA addr:            0x10212000\nPreloader -     Var1:                   0x25\nPreloader - Disabling Watchdog...\nPreloader - HW code:                    0x717\nPreloader - Target config:              0xe5\nPreloader -     SBC enabled:            True\nPreloader -     SLA enabled:            False\nPreloader -     DAA enabled:            True\nPreloader -     SWJTAG enabled:         True\nPreloader -     EPP_PARAM at 0x600 after EMMC_BOOT\/SDMMC_BOOT:  False\nPreloader -     Root cert required:     False\nPreloader -     Mem read auth:          True\nPreloader -     Mem write auth:         True\nPreloader -     Cmd 0xC8 blocked:       True\nPreloader - Get Target info\nPreloader - BROM mode detected.\nPreloader -     HW subcode:             0x8a00\nPreloader -     HW Ver:                 0xca01\nPreloader -     SW Ver:                 0x200\nPreloader - ME_ID:                      E4884188AB966E1162E5B3484E0A39A1\nPreloader - SOC_ID:                     C96D13D251A34745EAEA026C3FFD241421A1E9E9FECFCAEE2803D724E3F9E6D1\nPreloader\nPreloader - &#91;LIB]: \u2190&#91;33mAuth file is required. Use --auth option.\u2190&#91;0m\nDaHandler - Device is protected.\nDaHandler - Device is in BROM-Mode. Bypassing security.\nPLTools - Loading payload from mt6761_payload.bin, 0x264 bytes\nExploitation - Kamakiri Run\nExploitation - Done sending payload...\nPLTools - Successfully sent payload: C:\\Users\\Enigma\\Documents\\mtkclient-main\\mtkclient\\payloads\\mt6761_payload.bin\nPort - Device detected :)\nDAXFlash - Uploading xflash stage 1 from MTK_DA_V5.bin\nXFlashExt - Patching da1 ...\nMtk - Patched \"Patched loader msg\" in preloader\nMtk - Patched \"hash_check\" in preloader\nMtk - Patched \"Patched loader msg\" in preloader\nMtk - Patched \"get_vfy_policy\" in preloader\nXFlashExt - Patching da2 ...\nXFlashExt - Security check patched\nXFlashExt - DA version anti-rollback patched\nXFlashExt - SBC patched to be disabled\nXFlashExt - Register read\/write not allowed patched\nDAXFlash - Successfully uploaded stage 1, jumping ..\nPreloader - Jumping to 0x200000\nPreloader - Jumping to 0x200000: ok.\nDAXFlash - Successfully received DA sync\nDAXFlash - Sending emi data ...\nDAXFlash - DRAM setup passed.\nDAXFlash - Sending emi data succeeded.\nDAXFlash - Uploading stage 2...\nDAXFlash - Upload data was accepted. Jumping to stage 2...\nDAXFlash - Boot to succeeded.\nDAXFlash - Successfully uploaded stage 2\nDAXFlash - DA SLA is disabled\nDAXFlash - EMMC FWVer:      0x0\nDAXFlash - EMMC ID:         A3A561\nDAXFlash - EMMC CID:        d6010341334135363112244e382819a1\nDAXFlash - EMMC Boot1 Size: 0x400000\nDAXFlash - EMMC Boot2 Size: 0x400000\nDAXFlash - EMMC GP1 Size:   0x0\nDAXFlash - EMMC GP2 Size:   0x0\nDAXFlash - EMMC GP3 Size:   0x0\nDAXFlash - EMMC GP4 Size:   0x0\nDAXFlash - EMMC RPMB Size:  0x1000000\nDAXFlash - EMMC USER Size:  0xe67800000\nDAXFlash - HW-CODE         : 0x717\nDAXFlash - HWSUB-CODE      : 0x8A00\nDAXFlash - HW-VERSION      : 0xCA01\nDAXFlash - SW-VERSION      : 0x200\nDAXFlash - CHIP-EVOLUTION  : 0x0\nDAXFlash - DA-VERSION      : 1.0\nDAXFlash - Extensions were accepted. Jumping to extensions...\nDAXFlash - Boot to succeeded.\nDAXFlash - DA Extensions successfully added\nProgress: |\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588\u2588| 100.0% Write (0x1E6\/0x1E6, ) 1.45 MB\/s\nWrote preloader_bf7_h6127.bin to sector 0 with sector count 248812.<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">Awake at Last<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Now that the right Preloader had been flashed, it was time to force the device out of BROM Mode with the command:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>python mtk.py plstage --preloader=preloader_bf7_h6127.bin<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This was the MTKClient log:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.....Port - Device detected :)\nPreloader -     CPU:                    MT6761\/MT6762\/MT3369\/MT8766B(Helio A20\/P22\/A22\/A25\/G25)\nPreloader -     HW version:             0x0\nPreloader -     WDT:                    0x10007000\nPreloader -     Uart:                   0x11002000\nPreloader -     Brom payload addr:      0x100a00\nPreloader -     DA payload addr:        0x201000\nPreloader -     CQ_DMA addr:            0x10212000\nPreloader -     Var1:                   0x25\nPreloader - Disabling Watchdog...\nPreloader - HW code:                    0x717\nPreloader - Target config:              0xe5\nPreloader -     SBC enabled:            True\nPreloader -     SLA enabled:            False\nPreloader -     DAA enabled:            True\nPreloader -     SWJTAG enabled:         True\nPreloader -     EPP_PARAM at 0x600 after EMMC_BOOT\/SDMMC_BOOT:  False\nPreloader -     Root cert required:     False\nPreloader -     Mem read auth:          True\nPreloader -     Mem write auth:         True\nPreloader -     Cmd 0xC8 blocked:       True\nPreloader - Get Target info\nPreloader - BROM mode detected.\nPreloader -     HW subcode:             0x8a00\nPreloader -     HW Ver:                 0xca01\nPreloader -     SW Ver:                 0x200\nPreloader - ME_ID:                      E4884188AB966E1162E5B3484E0A39A1\nPreloader - SOC_ID:                     C96D13D251A34745EAEA026C3FFD241421A1E9E9FECFCAEE2803D724E3F9E6D1\nPreloader\nPreloader - &#91;LIB]: \u2190&#91;33mAuth file is required. Use --auth option.\u2190&#91;0m\nPLTools - Loading payload from mt6761_payload.bin, 0x264 bytes\nExploitation - Kamakiri Run\nExploitation - Done sending payload...\nPLTools - Successfully sent payload: C:\\Users\\Enigma\\Documents\\mtkclient-main\\mtkclient\\payloads\\mt6761_payload.bin\nPort - Device detected :)\nMain - Connected to device, loading\nMain - Using custom preloader : preloader_bf7_h6127.bin\nMtk - Valid preloader detected.\nMtk - Patched \"Patched loader msg\" in preloader\nMain - Sent preloader to 0x201000, length 0x3cafc\nPreloader - Jumping to 0x201000\nPreloader - Jumping to 0x201000: ok.\nMain - PL Jumped to daaddr 0x201000.\nMain - Keep pressed power button to boot.<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The battery icon was displayed on the screen; 0% it was. I charged it to 1% then powered up. I got the expected <a href=\"https:\/\/www.hovatek.com\/forum\/thread-31664.html\">Orange State warning<\/a> but this didn&#8217;t prevent the device from booting to the Home screen.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Conclusion<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The Wi-Fi and Bluetooth still can&#8217;t be turned on so fixing that will be the next objective.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The device was MediaTek MT6761-powered and running on Android 12 (HiOS). Its build number was BF7-H6127ABCDSTUAdAeAfArAs-S-GL-230719V1237 (this information wasn&#8217;t crucial for unbricking although it&#8217;s good to always note your software information). How it got bricked Its firmware was first dumped using Hydra Tool then its bootloader was unlocked via fastboot (required logging into Tecno ID [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":13002,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[918],"tags":[881,878,882,875,876,877,883,115,879],"class_list":["post-13001","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pov","tag-auth","tag-bf7","tag-carlcare","tag-deadboot","tag-mtkclient","tag-pop-7-pro","tag-preloader-auth","tag-tecno","tag-transsion"],"_links":{"self":[{"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/posts\/13001","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/comments?post=13001"}],"version-history":[{"count":5,"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/posts\/13001\/revisions"}],"predecessor-version":[{"id":13007,"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/posts\/13001\/revisions\/13007"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/media\/13002"}],"wp:attachment":[{"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/media?parent=13001"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/categories?post=13001"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hovatek.com\/blog\/wp-json\/wp\/v2\/tags?post=13001"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}