I lost my phone, how to get access?

Question

SIM cards

Phone on android hyavey, there was a password, 12 characters, will they be able to hack it?
I'm not talking about the demolition of data, but about the fact that data can be accessed or not?
Can I access my SIM online? (get codes from sms)
Can I block a sim card online? there was a card with pin1, puk1, etc., I did not create a personal account.
the phone was probably dead when it was found, if that matters.
megaphone and tele2 operators

Answer 1

the operator must do what you ask him to do through the PUK