After three years, telecommunications company T-Mobile is bringing a handy feature back to the T-Life app: self-service SIM swapping. SIM swapping lets users switch which SIM card is associated with a ...

If your new phone no longer supports SIM cards, or you don't want to use them anymore, you can convert to eSIM instead. I started my career with CNET all the way back in 2005, when the (original) ...