RIP SIM Cards! eSIM are here


It seems like every physical media is being replaced by digital media like DVD to cloud, movie ticket to digital QR tickets and much more. Also in SIM cards, standard Sim cards to Micro-SIM and than nano SIM. These will disappear now! eSIM are present in India as well. Let’s get to know about the cool features of eSIM and how e-SIM works.

What actually SIM Cards are?

SIM stands for Subscriber Identity Module. It is just a small card having some memory in it which stores some data like unique IMSI number (International Mobile Subscriber Identity number). It’s actually a 64-bit number and is different for every SIM holder in the world. With this number, the mobile network providers (i.e. Airtel, Jio) comes to know who we are.

A good example – when we do not pay our bills or do not recharges our phone, only our services are paused, whereas the services of other customers works as it is. It is the IMSI number stored in the SIM which reveals who we are in front of service provider.

The SIM card can also have some other data like a limited number of sms messages and contact details.

esim rip sim card

What is eSIM

e-SIM simply stands for embedded SIM and as the name suggests, it comes embedded on the motherboard of the mobile phone itself. e-SIM is a small rewriteable memory module which simply helps us to store IMSI number. On the other hand, its rewriteable property enables the eSIM user to change its network provider or mobile number by overwriting the old IMSI number to the new one.

The new eSIM have a lot of benefits and drawbacks as well, in the same vein. Let’s discuss both, advantages and disadvantages of eSIM.

Advantages of eSIM

  • Get Rid of Physical Cards: Swapping of SIM Cards is no mare a hesitation in the case of e-SIM. Permanently soldered inside eSIM says no to SIM trays, no Ejection tools etc etc. Frequent travellers can find it very handy to use eSIM.
  • More Secure: Alongwith the security of IMSI number, it can help you in case of mobile thefts as well! The thief cannot remove the eSIM without turning the device on. It’s very easy to take the physical SIM card out of the phone.
  • Convenience: You don’t have to go to outlet for a eSIM. Digital delivery of eSIM helps you to get it by a QR code on email or by some unique and confidential key.
  • Dual SIM usage: Usage of two SIM card is now possible in Apple iPhone. Thanks to eSIM.
  • Saves Valuable Space: The traditional SIM cards and their holders, mechanism or trays takes a lot of valuable space in devices. Meanwhile, saving this space can have a 3.5mm audio jack, extended battery and much more. Space is a big concern in small devices such as watches and bands etc.
airtel esim vodafone jio
A SIM Tray Setup!

Disadvantages of eSIM

  • Hacking Attacks: Delivered digitally. As a result of it, e-SIM are more prone to social engineering type attacks. But, technology is improving and it will be more secure with time.
  • Swapping the eSIM: Swapping from one device to another may be a bit complicated for normal users. Although, It is easy for pro users.
  • Troubleshooting: Troubleshooting is not that much easy with e-SIM. You can not check whether there is a problem from network provider’s end or there is a problem in your device.


To sum up, we can say that the future is eSIM. But to make it possible, the network providers needs time and money to change existing system. eSIMs are gaining popularity with time. However, currently Jio and Airtel have eSIM convenience in India. Also, some flagship mobile phones are having this eSIM feature, including Apple iPhone and Google Pixel lineup.

Further, don’t be surprised if your new device is not having eSIM embedded, specially when you are not going for a flagship device. Moreover, It will take years to change everything. So, wait and see how time changes existing physical SIM cards.

Thank you for reading. Stay tuned on for more such great content. Also, Don’t forget to subscribe to our newsletter.

Related: Mobile Networks – HSDPA, HSPA, LTE, GSM etc.

Related: About WiFi – 2.4GHz, 5GHz, a,b,g,n,ac,ax? What is WiFi 6?


Author: Prateek

Technology Enthusiast, Computer Science Student

Leave a Reply

Your email address will not be published. Required fields are marked *