Do you have to change your sim card for a new phone?
It depends on the type of SIM card and the compatibility of your new phone. If your new phone uses the same type of SIM card as your old phone and the SIM card is not damaged, you can simply remove the SIM card from your old phone and insert it into your new phone. However, if your new phone requires a different type of SIM card or if your old SIM card is damaged or incompatible, you will need to get a new SIM card from your mobile carrier.
Do i need to change my sim card if i am switching new carriers or changing phone number?
Additionally, if you are switching carriers or changing your phone number, you will also need to get a new SIM card from your new carrier. In some cases, your new carrier may provide a SIM card when you sign up for service, while in other cases, you may need to purchase a new SIM card separately.