Crucial Warning: Ensure MediaTek USB VCOM (Preloader) drivers are correctly installed on your computer prior to flashing. Always select "Download Only" in SP Flash Tool. Never select "Format All + Download", as doing so completely erases the protected NVRAM partition blocks, resulting in permanent loss of factory baseband calibration and invalid dual IMEI addresses.
Download Firmware for Lenovo A5600
A5600_USR_S216_1607021615_L1MP3V1_8G_CU_CN.7z
Official factory service stock ROM for the Lenovo A5600 China Unicom 8GB variant. Includes complete partition table, preloader, boot, recovery, system, and userdata binaries.
MD5: 8029f2df1548052aeca92c4c3a331d07
Flashing Overview for Lenovo A5600
- Download and unpack the A5600 firmware package to C:\Lenovo_A5600
- Install MediaTek USB VCOM Preloader drivers on your Windows PC
- Open SP Flash Tool and select MT6735M_Android_scatter.txt under Scatter-loading
- Set flashing mode to "Download Only" and click the Download button
- Power off phone, remove/reinsert BL253 battery, hold Volume Down, and plug in microUSB cable
Expand preparation checklist for Lenovo A5600
- Verify your device model is Lenovo A5600 by checking the label under the removable 3000mAh battery (model BL253).
- Install 64-bit MediaTek USB VCOM drivers on a Windows PC (temporarily disable Driver Signature Enforcement on Windows 10/11).
- Extract the 7z archive to a short root directory without spaces or special characters (e.g., C:Lenovo_A5600).
- Ensure MT6735M_Android_scatter.txt and raw partition images are present in the target folder.
- Verify the removable 3000mAh battery retains at least 40% charge before beginning the flashing sequence.
- Connect a reliable microUSB 2.0 cable directly to a rear motherboard USB port to maintain consistent handshake voltage.
Compatibility & Bootloader Notes
Flashing stock firmware via SP Flash Tool writes partition blocks directly over the MediaTek MT6735P Boot ROM (BROM) / Preloader protocol and does not require an unlocked bootloader.
Ready to Flash This Firmware?
Full step-by-step instructions for Lenovo A5600, including prerequisites, error fixes, and screenshots, are on FlashGuideHub's SP Flash Tool guide.
Frequently Asked Questions
The Lenovo A5600 is built on MediaTek's 64-bit MT6735P processor paired with an ARM Mali-T720 MP2 GPU and 1 GB of LPDDR3 RAM. The motherboard platform identifier is hq6735m_65u_b1d_l. The "P" designation indicates a power-optimized 1.0 GHz maximum CPU clock compared to the 1.3 GHz clock found on standard MT6735 chipsets.
The Lenovo A5600 integrates 8 GB of eMMC 4.5 non-volatile flash storage using an MBR/scatter partition map, providing approximately 4.5 GB of usable space for userdata. Storage capacity can be expanded using a dedicated physical microSD card slot supporting up to 32 GB formatted as FAT32.
The "CU" suffix indicates customized radio and carrier provisioning for China Unicom, while "CN" designates mainland China. The modem binary included in this package configures cellular RF frontend filters for FDD-LTE Band 1 (2100 MHz) and Band 3 (1800 MHz), as well as WCDMA Band 1 and Band 8.
Build S216 represents the final production maintenance firmware release for the Lenovo A5600. It is based on official Google Android 5.1 (Lollipop) customized with Lenovo VIBE UI 2.5, running Linux kernel 3.10.65 with full 64-bit ARMv8-A ART runtime execution.