goodbye sim card, hello esim
by tang zhexiao
when bought a new phone, we probably have to handle a sim card, a small plastic card that can be slotted into our mobile phone as subscriber identity module.
but as technology advances, sim cards are getting change. the next time we buy a phone, it might not have a sim card at all - instead, it'll have an embedded-sim (esim).
esims are the digital version of sim cards. as a small chip embedded in the handset- an esim can't be removed and put in another phone.
however, information on an esim is rewritable, which means users can change their network without removing their sim card and inserting a new one.
at present, esim technology can be used in a wide range of applications, including wearable devices, tablets, pcs and other terminals such as smart speakers and pos machines, covering various scenarios such as sports, entertainment, education, etc.
users can also access two or three operators at the same time, and use them for voice and data storage respectively.
detachable traditional sim cards have a short service life and occupy a large space. the volume of an esim is only 10 percent that of a traditional sim card, while also having strong resistance against external force and high temperature.
of course, esims will not completely replace traditional sim cards immediately.
with the rollout of esims, the main carrier of future communication may be wearable devices and the functions of mobile phones will be gradually phased out.