Hi, David. Thank you for your response.
I answer, the battle is Lv.32 “The White North-1”.
My device is DIGNO DUAL 2(WX10K) by Kyocera.
RAM seems 1.5GB.
I’ll try stopping other resident apps.
I installed a tool to organize several resident stuff, but the result is not good.
After fighting at the portal of chaos, the program goes down with high probability.
After winning the battle, confirming the achievements, pressing the confirm button, after seeing the description of tank type, the screen turns black without returning to the field.
Is there no choice but to replace the phone to the shortage of RAM?