6571 nand flash not support ?

Operation : Flash Erase [ v1.40 ]
User accepted Flash Erase operation!

1. Power Off Phone , Remove battery , Insert back
2. Insert USB cable. In some cases require hold BootKey

Wait for phone…
Phone found! [ 51 ]
Sync…
Inital regs read done
Boot Info :
BB_CPU_ID : 6571
BB_CPU_HW : CA00
BB_CPU_SW : 8D00
BB_CPU_SB : 0000
BB_CPU_NM : [MediaTek] MT6571_S00
Processing BROM stage
BLVersion : 0x01
SecCfgVal : 0x00000000
BromVersion : 0xFF
BLVersion : 0x01
Preloader Status : Alive
Processing DA stage
DA Select done , sending
DA Ver : MTK_AllInOne_DA_v5.1540.01.01
NAND_ID : 002C00BC009000660054000000000000
eMMC_ID : 00000000000000000000000000000000
DA Stat : v4.2 on BBID : 0x8B
DA Sent. Configure setting now …
DA started successuflly
NAND FlashIC initialized
[NAND] : FLASH_VEN : 0x0088 , [Micron] NAND_MT29C4G48MAAHBAAKS_5WT
[NAND] : FLASH_DIE : 002C 00BC 0090 0066 0054 0000 0000
[NAND] : FLASH_LEN : 0x20000000
[NAND] : FLASH_EXT : 1000/0040/01/NIM_Px-1
INT RAM : 0x00020000
EXT RAM : 0x10000000
BOOT TYPE : NAND_FLASH_BOOT
SOC VERIFY : C1
Boot Ok!

NAND not supported yet!

Done!
Elapsed: 00:00:07
Reconnect Power/Cable!