Connecting to BootROM...
Power off the phone, disconnect and reconnect the battery(if possible) and connect USB cable...
Hold the VOL DOWN to force MediaTek BootROM.
Scanning BootROM or Preloader port(30 s)... Done.
Detected MediaTek PreLoader USB VCOM (Android) (COM13)
USB Driver: [MediaTek Inc.] wdm_usb, version: 3.0.1437.1, date: 9-11-2014
Connecting Bootrom... Done.
Sending Download Agent... Done.
Platform: MT6753_S00, Hw ver: 0xCA00, Sw ver: 0x0000
Secure ver: 0xFF, BL ver: 0x01
Secure config: 0x00
SRAM size: 128 KiB
DRAM size: 2 GiB
PL Secure ver: 0x02
Storage type: eMMC
Card/BGA: BGA (Discrete embedded)
Manufacturer ID: 0x15 (Samsung)
Product name: R821MB (0x523832314d42), rev: 0x00, serial number: 0x0674D4BB
Manufacturing date: РёСЋРЅ 2015
CID: 15010052 3832314D 42000674 D4BB625F
Capacity: 14.57 GiB(15,646,851,072 bytes)
Boot1: 4096 KiB
Boot2: 4096 KiB
RPMB: 4096 KiB
User area: 14.56 GiB(15,634,268,160 bytes)
USB speed: High-Speed
Verifying SoC: passed
Verifying CID: passed
Writing preloader, size: 150.37 KiB
Writing devinfo, size: 524 bytes
Writing lk, size: 252.25 KiB
Writing boot, size: 7.40 MiB
Writing recovery, size: 11.89 MiB
Writing logo, size: 696.25 KiB
Writing secro, size: 132.25 KiB
Writing tee1, size: 55.50 KiB
Writing tee2, size: 55.50 KiB
Writing custom, size: 181.04 MiB
Writing system, size: 1.18 GiB
Writing cache, size: 8 MiB
Writing userdata, size: 197.30 MiB
Completed in 6 mins 15.060 s