Does a SIM card on a Cell Phone wear out?

Answer 1

I dont think a sim card can wear out.

Actually, some older model sim cards were found to have a vulnerability once 3G hit the air. As the sim hands off connection back and forth between 2G and 3G coverage, it runs through a finite number of possible connections. While this finite number is something akin to 999999, over the course of time-depending on your phone , coverage area, and movement throughout coverage, an older sim can effectively burn itself out.

Network providers now offer what is called a UICC sim card which was re-engineered to handle the multiple hand-offs required by 3G capable networks. These sims are typically provided free of charge to authorized account holders.

Answer 2

No. If your SIM card breaks, your phone won't work. However, if you replace your SIM card, your phone will work again.