Hello i would like to know what the best way to root my S2.Ive done other android devices,been reading and this one might be a little challenging..i have android version 4.1.2 software version gb27. also once rooted read about yellow triangle.is that a issue? and whats a good rom and kernel combo i can download..also do i need sd card or can i use memory on phone to save and flash everything..thank you for you help and helping..