Hey.. I'm going to download Windows Phone Recovery Tool to downgrade back to Windows 8.1 on my Lumia 520. My question is.. after I download the 1.6 Gigs firmware, will the data be automatically removed or can I use it for recovering my friend's Lumia too which happens to be a 520 too ?... If not, is there any way in which I can find a standalone package to download the firmware so that I can use it for both Lumias and also as our Internet speed as slow as 512 Kbps, I can't download same files twice.. Avg. speed in India.. Anyway.. Thanks for noticing.