Read ATF JTAG :

ATF JTAG Initial Phone Support List (All Lumia WP8 Released Phones):

Lumia 928 RM-860
Lumia 925 RM-910
Lumia 925 RM-893
Lumia 925 RM-892
Lumia 920T RM-867
Lumia 920 RM-822
Lumia 920 RM-821
Lumia 920 RM-820
Lumia 820 RM-826
Lumia 820 RM-825
Lumia 820 RM-824
Lumia 720T RM-887
Lumia 720 RM-885
Lumia 620 RM-846
Lumia 521 RM-917
Lumia 520T RM-913
Lumia 520 RM-915
Lumia 520 RM-914

Main ATF JTAG Software Features:

* Cheap 1 time Activation Cost with NO additional Hardware Purchase needed
* Super Easy Nokia WP8 JTAG JIGS Already Available
* Super Easy Interface... Simple and Effective
* Clear JTAG Pinouts Viewer
* Fast JTAG Connection (480 Mbps USB via ATF Box)
* Fully Customizable Software GUI Language (Create your own Language File)
* Repair any "DEAD BOOT" Lumia WP8 Phone
* "QUICK FIX" Option - For Dead phones via Flashing
* "FULL BOOT" Option - For Dead phones via eMMC Boot Corruption