Should I be worried about a lost SIM card?

I just got new line of service in a cellphone store. They kept my old SIM card after installing the new one, should I be concerned about any potentially malicious activity that could take place since I am no longer in possession of the old SIM card?

Submitted November 12, 2020 at 09:21AM by MEIflyer https://ift.tt/3eQTE1T via TikTokTikk