Apple 's touch ##screen on the iPhone 5S does n't always work the way it should . Some iPhones do n't approve fingerprints they 're supposed to approve . ( You 've probably used the latter at the DMV or gym . ) It is susceptible to problems caused by dust , dirt , and electrostatic discharge , . User error could also be causing some iPhone 's issues with the caller ID system .
Apple 's touch ##screen on the iPhone 5S does n't always work the way it should . Some iPhones do n't approve fingerprints they 're supposed to approve . It is susceptible to problems caused by dust , dirt , and electrostatic discharge , . User error could also be causing some iPhone 's issues with the caller ID system .