Is it good to downgrade my iPhone 4 with iOS 7.1.2 to 6.1.3?

why ? because you can or u miss the old 6.1.3 , its not easy to downgrade and its not something you can do in an hour or so , quite simply its not worth the time and effort it takes to downgrade, u need a lot of things in place and you need to read a lot of things online and sometimes the downgrade fails and u will be left with a paperweight.

if u have a perfectly working phone albeit a bit slow , try keeping minimal apps and keep using it.

I personally tried to downgrade and wasted a whole lot of time and energy and ended up with a brick in my hand , somehow after spending a week online and numerous youtube videos and numerous posts i got it back to working condition..

so if u have nothing important on your hands to do u can Try to downgrade .

lemme know how it goes and in case u need any help .. but its simply not worth it