Dude for having usb otg,we need kernel that supports otg..even though it is developed,an external power source will be required to make it work...and we don't have Any pro dev working for our budget devices...
I understand your wish bro...I had the same when I bought the phone
hit the thanks if I helped you,don't just say it...
sent from my E dual C1604
Sony Xperia E dual C1604
MY OWN NoZ ROM
STOCK KERNEL WITH CWM.....
HIT THE THANKS IF I HELPED YOU...IT'S FREE ACTUALLY BUT MEANS A LOT TO ME