Complete Guide to Vortex CG65 Modifications: Stock ROM, TWRP/OFRP Recovery, and GSI ROMs

Introduction to the Vortex CG65: A Modder’s Best Budget Device

Possibly the most bespoke cheap Android 13 smartphone of 2024 is the Vortex CG65 (MT6765). Equipped with its **MediaTek Helio P35 chipset, 4GB RAM, and Treble support, this smartphone boasts enormous flexibility for expert users.

Vortex CG65 Hardware Specifications Analysis

Prior to altering your device, know its fundamental parts:

• Chipset: MediaTek Helio P35 (12nm process)

• CPU: Octa-core (4x Cortex-A53 @ 2.2GHz + 4x Cortex-A53 @ 1.6GHz)

• GPU: PowerVR GE8320 @ 680MHz

• Memory: 4GB LPDDR4X RAM + 64GB eMMC 5.1 storage

• Display: 6.5" HD+ IPS LCD (720x1600) with 60Hz refresh rate

• Battery: 4400mAh Li-Po with 10W charging

• Kernel: Linux 4.19.191 with BSP changes

• Partition Scheme: A/B (smooth updates) with dynamic Super partition

Preparations Needed for Vortex CG65 Modding

Requirements for Bootloader Unlocking

1. Enable OEM Unlocking in Developer Options
2. Install MTK VCOM Drivers on your PC
3. Download MTKClient v2.6+ (open-source MTK tool)
4. Prepare USB 2.0 cable (improved compatibility)

Key Backup Steps

• Dump full firmware using MTKClient: mtk rl out –preloader preloader.bin

• Backup NVRAM partitions (IMEI/DRM keys): mtk rf nvram nvram.img

Original Stock ROM for Vortex CG65

Official Firmware Details

• Build Number: CG65_Vortex_13.0.1_20241015
• Security Patch: October 5, 2024
• File Size: 2.64GB (compressed sparse image)
• Download: MEGA Link

Flashing Instructions

1. Enter BROM Mode: Power off + Vol Down + USB connection

2. Run emergency flash: mtk wf vortex_cg65_stock.img mtk reset

3. First boot will be 8-10 minutes

Custom Recovery Installation Guide

TeamWin Recovery Project (TWRP) v3.7.1

• Features:
  • Decrypted data access (with DFE-NEOv2)
  • A/B partition awareness
  • Built-in Magisk v27 patcher

Installation Steps:

1. Download TWRP Boot Image

2. Flash using fastboot: fastboot flash boot_a twrp_cg65_v3.7.1.img fastboot flash boot_b twrp_cg65_v3.7.1.img

3. Format data partition after first boot

OrangeFox Recovery (OFRP) R11.1

• Advantages Over TWRP:
  • Better touchscreen calibration
  • Internal file manager
  • Live log viewer

Flash Process: fastboot flash recovery_a ofrp_cg65_r11.1.img fastboot flash recovery_b ofrp_cg65_r11.1.img fastboot reboot recovery

Custom ROM Installation: ArrowOS v13.1 GSI

Requirements

• Unlocked bootloader
• TWRP/OFRP recovery flashed
• DFE-NEOv2 zip downloaded

Step-by-Step Flashing

1. Wipe partitions:

   • System
   • Vendor
   • Product
   • Data

2. Flash modified Super image: fastboot flash super arrowos_v13.1_super.img

3. Disable encryption: fastboot flash vbmeta vbmeta_disabled.img

4. First boot initialization: fastboot -w fastboot reboot

Advanced Modding Techniques

Kernel Source Modifications

The stock 4.19.191 kernel can be upgraded with:

• Overclocked GPU frequencies (680MHz → 800MHz)
• zRAM swap file optimizations
• SELinux permissive mode patch

Custom Kernel Build Steps: git clone https://github.com/vortex-kernel/android_kernel_mediatek_mt6765 make ARCH=arm64 vortex_cg65_defconfig make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu-

Troubleshooting Common Issues

Bootloop Solutions

1. Hard Reset Sequence: Power + Vol Up for 15 seconds

2. MTKClient Emergency Flash: mtk da seccfg unlock mtk wf vortex_cg65_stock.img

3. SP Flash Tool alternative method

Performance Benchmarks Post-Mod

Final Recommendations

1. Always verify MD5 checksums before flashing
2. Maintain 20%+ battery while working
3. Use USB 2.0 ports for stable connections
4. Support us at our MagiskModule Community

Disclaimer: Modifying device software voids warranties and carries risks. Proceed only if you know potential hardware/software failure. All files are provided “as-is” with no guarantees.