1. Flashify app (Download from play store.)
2. Stock recoveryhttps://drive.google.com/file/d/0B950NiycK9l2WkYtTUJPQkE0R1k/view?usp=docslist_api
3. Stock unmodified rom or download untouched TWRP backup and restore via recovery....
* * * * * * * * * *Now time comes to upgrade your phone to Marshmallow 6.0, So we have a Marshmallow Ruu, we don't have to go through the Ota update method, So quickly match * * * your phones specifications to following and get prep...
when goes to bootloader it shows
A51_DTUL PVT SHIP S-ON
Nov 17 2015,17:29:04.0
no gift file...
Now time comes to upgrade your phone to Marshmallow 6.0, So we have a Marshmallow Ruu, we don't have to go through the Ota update method, So quickly match your phones specifications to following and get prepared to upgra...
HTC Desire 820n1-sim https://yadi.sk/d/sCzAyKFHrr7JC TWRP Recovery of OS 3.17.401.3 6.0.1 Marshmallow,Euro
OK it's European and not Indian.
Sent from my HTC Desire 820 dual sim using xda premium