What are some useful hacks for smartphones?
I dont know much about the hacks of a smartphone Vishal, but if your question should have been related to an Iphone, i would have shared some mind blowing tricks with you!
Regarding smartphones, you can use this trick to have your private wikipedia in your whatsapp :
Add these numbers as Wiki, wiki2
Create a whatsapp group with just you,wiki & wiki2
Now ask any question like :
Wiki <space> "time of the day"
You'll get your answer!!
It is an app which is able to rewrite in-app purchases of some games and apps,in which you can buy game coins,money,gp and diamonds without any cost,but works only with some apps and games
Androdumper and wps wpa tester
Both of these were is used to hack wifi devices nearby you with wps wpa encryption,it could decrypt wifi devices if mac address filter disabled in that wifi router