Written by Soo-hyung Park, Contributing Writer March 18, 2024 at 8:20 a.m. PT Kerry Wan/ZDNET The Universal Subscriber Identification Module, known as USIM and SIM, is evolving.

Because the SARA-R500E module’s eSIM does not need to be inserted manually by the end-user it allows product developers to design tightly sealed devices that meet the demanding IP67 and IP68 criteria.