ATF Lumia 640 XL DS WinPhone 8.1 Full Flashing!
Also check out other Lumia WinPhone 8.0/8.1/10 Phones Flashed by ATF:

Microsoft Lumia 430 DS - Fully Tested
Microsoft Lumia 435 DS - Fully Tested
Nokia Lumia 520 - Fully Tested
Nokia Lumia 530 - Fully Tested
Nokia Lumia 620 - Fully Tested
Nokia Lumia 625 - Fully Tested
Nokia Lumia 630 - Fully Tested
Nokia Lumia 638 - Fully Tested
Nokia Lumia 720 - Fully Tested
Nokia Lumia 735 DS - Fully Tested
Nokia Lumia 810 - Fully Tested
Nokia Lumia 820 - Fully Tested
Nokia Lumia 822 - Fully Tested
Microsoft Lumia 830 - Fully Tested
Nokia Lumia 920 - Fully Tested
Nokia Lumia 925 - Fully Tested
Nokia Lumia 928 - Fully Tested
Microsoft Lumia 929 - Fully Tested
Microsoft Lumia 930 - Fully Tested
Nokia Lumia 1020 - Fully Tested
Nokia Lumia 1320 - Fully Tested
Nokia Lumia 1520 - Fully Tested

You Can Download Flash Files Here:
Nokia Product Code Listing for NaviFirm+ Download - (Nokia 730, 735, 830 Added)

Microsoft Lumia 640 XL DS WinPhone 8.1 Flashed Successfully with ATF

Here are the Screenshot:


Here is the Flashing Logs:
Code:

Windows Phone 8/8.1 Flashing Started
Loading Flash Files Please Wait...

================================================== ====
Windows Phone 8/8.1 Lumia Flasher
================================================== ====

If the Phone is ALIVE
1. Power On the Phone and Connect it to the USB Port

If the Phone is DEAD
1. Connect Phone to the USB Port
2. Press and Hold the VOLUME DOWN and POWER Buttons
3. Wait until the Phone Vibrates Shortly...
4. Stop Pressing the Buttons...

If the Phone is DEAD BOOT
1. Connect Phone to the USB Port
2. Install Correct Drivers:
"Nokia Emergency Connectivity"
================================================== ====

================================================
Basic Phone Information
================================================
SW Version : 02166.00000.15103.05001
IMEI Plain : 357158063859909
IMEI2 Plain : 357158063859917
Phone Type : RM-1067
HW Version : 2400
Product Code : 059X1G0
Basic Product Code: 059W080
Module Code : 0206150
PSN Number : 7C555CBAU
Operator Name : 000-PH
Phone Version : BuildDate : Mar 4 2015 , BuildType : Release , HelloString : NCSd for WP8 , Version : 5.0
Manufacturer ID : RM-1067_1009
Security Mode : Restricted
================================================
Extended Phone Information
================================================
Public ID : E3407008726D21EE8C1A851FB6BF3AEEDF9031A7
Wireless Lan 0 ID: 80:C5:E6:0A:EDC
Wireless Lan 1 ID: 80:C5:E6:0A:EDD
Wireless Lan 2 ID: 80:C5:E6:0A:EDE
Wireless Lan 3 ID: 80:C5:E6:0A:EDF
Bluetooth ID : 80:C5:E6:0A:B8:52
================================================
Simlock Information
================================================
SIMLOCK STATE : Not Locked
Booting Flash Mode Initiated...
Please wait upto 15 Seconds for HW Reset
Boot Flash Mode Successful...
Buffers Flushed OK...
Phone Info Query Start...
Blocks Returned: 0x09 Blocks
Block ID 0x01 : 00241000
Block ID 0x1F : 01
Block ID 0x02 : 00240000
Block ID 0x03 : 00E90000
Block ID 0x05 : Nokia.MSM8226.P6199.2.0
Block ID 0x0D : 0001
Block ID 0x0F : 0301010100000101FF
Block ID 0x10 : 01000F0000
Block ID 0x20 : 010000000100000004
Checking SD Card Size...
Card Size: 0x00000000
Checking Platform Security Status...
Platform Secure Boot Status: Active
Secure FFU EFUSE Status: Active
Debug Status: Active
RDC Status: Not Active
Authentication Status: Not Active
UEFI Secure Boot Status: Active
Checking Secure FFU Mode...
Secure FFU Mode :
Query Flash App Information...
Flash App Information: 020225023C00
UEFI App: FLASH APP
Flash App Protocol Version: 2.37
Flash App Implementation Version: 2.60
Query ROOT KEY HASH...
ROOT_KEY_HASH: 682455784C6A1730952BF78A8EB41A4FAA98B4B4828BA1F74C 71E21E921C3960
Query PUBLIC ID...
PUBLIC_ID: E3407008726D21EE8C1A851FB6BF3AEEDF9031A7
Query eMMC Info...
EMMC Manufacture ID: TOSHIBA
EMMC Product SN : A629D1A6
EMMC_SIZE: 8 Gigabytes
Query Battery Charge Status...
BATTERY CHARGE_STATUS: 63%
Sending Image Signatures...
Image Signatures Accepted!
Erasing Data Partition...
Data Partition Erased Successfully
Preparing Buffers for DATA LOOP...
Allocating System RAM OK!
Start Sending DATA BLOCKS...
Finished Sending all DATA BLOCKS!
Exiting FLASH Mode via REBOOT...
Exit FLASH Mode Successful!
Flashing Done!
Total Flashing Time : 00:05:19
Here is our Test Phone...



FLASHING The Phone...


BOOT Repair Tests will follow