Tags: Phones modems and tablets
Avoid losing your numbers
If you've been using your SIM to store contacts, remember to back them up before switching SIMs so that they'll be accessible on your new phone or SIM. Once you've switched over to your new SIM, you won't be able to access contacts stored on your old SIM.
Note: If you've damaged your old SIM or already had a SIM swap done, you might not be able to access the contact entries on your old SIM.