I’ve got one problem that i can’t solve.
Some apps crash sometimes with no reason.
Month ago i tried to change davlik to art by changing that txt file, i don’t remember the name. After that my apps started crashing a lot. For example Google Play or vk(social network). I tried to hard reset, upgrade to 4.2.8i or to 4.5i. Nothing has helped. I don’t know what to do. Is there any way to clear my phone properly (all system files should be reseted).