How to Downgrade Arc&Arcs Using Flashtool

Arc & ArcS












1 : Download Flashtool
2 : download Firmware
- os Android= 2.3.4
-build Number--4.0.2.A.0.42
3.Copy firmware that already download to flashtool/firmware
4.open flashtool
5.click Lighting icon / select flash mode
7.select your phone firmware -> Click okie
8.TUrn off ur phone and Connect your phone to pc by holding Back button when software prompt u to connect
this is program flashtool 








you select Lt15i and  your build number








And turn off phone than hold back button. and connect to your Computer 



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