In my country, carriers are allowed to cancel your SIM card if you don't use it for a couple of months, then give the number to some other, new customer. It's

In my country, carriers are allowed to cancel your SIM card if you don't use it for a couple of months, then give the number to some other, new customer. It's a nightmare since you can lose your accounts and even the debit card is tied to a phone number to make online payments. I wanted to swap providers but I had to keep the old SIM active in a phasing-out stage...