unpackimg.sh boot.img
Modify ramdisk or kernel, then repack:
repackimg.sh
Output: image-new.img – rename it to boot.img.
TCL might push an Android 14 update that breaks battery life or camera performance. Official channels rarely allow downgrading to Android 13. Repack firmware, however, can force a downgrade (though this requires a full wipe).
| Feature | Official TCL Firmware | Repack Firmware | |---------|----------------------|------------------| | Source | TCL OTA / support site | Third-party developers | | Safety | High (signed) | Variable (unsigned) | | OTA Updates | Yes | No | | Bloatware | Yes (carrier & TCL) | Often removed | | 5G Band Support | Region-limited | Potentially unlocked | | Warranty | Retained | Voided | | Root access | No (requires separate process) | Pre-rooted possible | | Ease of flash | Recovery sideload | PC tool required | firmware tcl 50 5g repack
Repacks from unverified sources on forums can contain:
Use mtkclient (preferred for Mediatek):
sudo python3 mtk wl
sudo python3 mtk rl --partitions boot,super,persist,md_udc,seccfg,tee1,tee2,logo,dtbo,vendor_boot
Or use SP Flash Tool – Read Back with correct starting address and length from scatter file. unpackimg
Carrier-locked variants (e.g., Verizon, MetroPCS, Vodafone) have restricted firmware. A repack based on the Global (EU/International) version removes carrier bloatware and unlocks hidden network bands or hotspot restrictions.
lpunpack super.img super_extracted/
Make changes inside extracted images, then repack:
lpmake --metadata-size 65536 \
--super-name super \
--device-size 8589934592 \
--block-size 4096 \
--group group_primary 8589934592 \
--partition system:readonly:extracted_system.img:group_primary \
--output repacked_super.img
⚠️ Ensure partition sizes don’t exceed original groups. Modify ramdisk or kernel, then repack: repackimg
Gather the following:
| Item | Description | |------|-------------| | Windows PC (Windows 10/11) | Linux/Mac is harder due to driver compatibility. | | SP Flash Tool v5.2128+ | The standard tool for MediaTek chips (TCL 50 5G uses MT6833 or similar). | | TCL USB Drivers | Official TCL/MediaTek VCOM drivers. | | Original USB Cable | A cheap cable will disconnect mid-flash. | | Backup | All data will be erased. Backup photos/docs to Google Drive or SD card. |