your cell phone number is not your number
My father got a new number from a reputed telecom service provider. Within a week he got a call from the bank to payback the bank loan, which was taken from the person who was previously using this phone number. Yes, the service providers recycle the numbers. The above situation is not a problem, he got calls for a coupes of weeks from various executives, then he explained that the number is no more linked with the person you looking for, then they stopped calling.
There is another story, I took a new SIM for my wife when we moved to a new city from our hometown, Her new number is also been recycled, but thank God, no calls from banks to payback the loans. But once she wanted to take UBER, now she gives her details, but phone number is already registered with another person’s name and email Id. She was not able to book UBER, so she took public transport. Now she want’s to book a train in app, the same problem with booking train, the number is already registered. So the only way is to go directly to railway station and book the ticket. These kinds of problems makes our life hard.
There is another kind of problems, hypothetically, if you are using the recycled number, and the previous person used the same number to registered in some illegal websites or unwanted websites. Imagine getting calls from unknown person, this will put you new problems which you never thought of.
I don’t know the solutions, I just found a problem.