We must start day with warning from Gal Beniamini. Some of Snapdragons processors have gap in security that makes them venurable too attacks.
Solution for this issue are instalation of May security patch but not all producers provide it (aspecially smaller marks have this problem.)
Duo Labs (another security researcher) urge us all to patch systems regullary. Their data indicates that people searching secure android devices should invest in Nexus and Samsung models – those brands release securty patches fastest.

Source: phonearena