Galaxy s2 stuck on samsung logo after installing an app I installed a game on my Samsung galaxy s2 using an .apk file. 
I was playing a while, and after a couple of minutes my phone rebooted and got bootlooped. 
Now there is no boot-loop anymore, but it stucks on Samsung logo.


I can get into Recovery mode/Download mode.
My phone has a "PhilZ Touch 5" recovery.


How can I revive my phone?
The usual way of fixing bootloops is doing a Factory Reset (via Recovery mode). Of course, you will lose your data.

But seeing that you have a custom recovery, do you also have a custom ROM installed? If yes, try (dirty) flashing the custom ROM via custom recovery. Don't forget to wipe cache and Dalvik cache.