freezes

sometimes when I enter a profile in instagram, the screen remains black. The device freezes sometimes. (ETC: Gallery, Social Media ....) camera2api is off. I'm opening it, but it closes after the update. Sim Card Activation for Micloud does not work. Does AI start working ? Yesterday, while...

I just received a Xiaomi Max 2 from Geekbuying and I live in Spain. The cell phone gives constant system errors, to which I send the reports. Also using any keyboard freeze for several seconds and then write what you want. Background processes are usually stopped. I guess it will be a problem...