Intex Aqua 3G NAND MT6572 format Done Without any issue by GsmShield Mtk Tool 
Code:
Action : Format UserData.
Selected 0-By CPU:ELBRUS
Exe version: GSMSHIELD MTK 1.0
Reinsert phone battery.
Battery must be charged.
Phone must be off with battery inside.
Please insert USB cable now...
Detected : MediaTek PreLoader USB VCOM (Android) (COM79)
Boot mode: Preloader
BBCHIP: 6572 0 ca00
Using Algo 1.
Phone detected...Please wait
Sending DA agent, please wait...
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BaseBand CPU :MT6572
BaseBand CPU Secure Version : FF
BaseBand CPU Bootloader Version : 01
----------------------------------------------------
INT RAM: 128 KB SDRAM
EXT RAM: 256 MB DRAM
----------------------------------------------------
NAND: (4Gb+2048Mb) [Micron] NAND_MT29C4G48MAAHBAAKS_5WT
BOOT STYLE : NAND BOOT
Size: 0x20000000 [0.500 GB]
BlockSize: 0x40000 PageSize: 0x1000 SpareSize: 0xe0
Searching partiton table, wait..
Offset: 0x1f5c0000
Status: USB_HIGH_SPEED
Detecting high speed port, wait......
If driver not installed, install high speed port driver.
If not need high speed port, disable it.
After repeat opperation.
Detected : MediaTek DA USB VCOM (Android) (COM80)
Detecting format adress....wait!
Starting generic userdata format...!
[1]FORMAT - BEGIN: 0x12ec0000 - LEN: 0x700000
[1]FORMAT - BEGIN: 0x135c0000 - LEN: 0xbfc0000
Format adress not detected, aborting!
Wait untill phone will start charging.
[0]All done.
regards