I bought a licensed version of minecraft on my phone and played normally on the first day until I started crashing. In this case, the game starts to crash only at the moment when the Internet is not available, and when it is, the game does not crash.

Now I study at school and during recess I have the opportunity to play, but since I only have the Internet at home, I cannot play at school (it crashes when there is no Internet).

Where are the departures from? Can the problem be solved?