[Q] Question/Enquiry about firmware (Indian Users)

[100rabh7791]

hello every1

I previously owned a Xperia SL ... i experienced very poor batter bkup ..as i was on Indian firmware.. but when i shifted to World firmware my battry backup was incrsd to 1.5 times .. i dunno the reason why

bt has any1 tried to shift frm indian to world firm on ZL??