Syren not turning off

I think I have read all the topics about the problems with disabling the syren but each of them ends with no solution.

I removed the sim card because I had bought a new phone. The syren went off, message was sent to my friend, I got the pin, the syren stopped but then I removed the sim card again and after turning the old phone on, the syren went off again.

I even factory reset the phone but the syren is still going off.

I also removed my device from the account thinking that it would help.

Can I just put any sim card to stop the syren?

How do I disable this alarm? My old phone is useless because of that.

Many thanks for your help.

Hi, enter your Avast PIN.

I have tried that but it does not work.

http://www.avast.com/faq.php?article=AVKB127#artTitle (Restore forgotten PIN)

Thanks for the link and fast responses but:

1.) I can’t open my avast app because of the syren

2.) I can’t sue the alternative method of resetting the PIN because I removed the device from my account.

Can’t help you then, contact support: https://support.avast.com/support/tickets/new

They can’t help me as I have no licence, I am using a free avast product.

Seriously there is no one who could help? My phone is useless now.