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eUICC enables you to change connectivity service provider Over-The-Air (OTA), without SIM/ eSIM replacement.

4 Takeaways For Adopting eUICC/eSIM Based Connectivity

Caption - eUICC enables you to change connectivity service provider Over-The-Air (OTA), without SIM/ eSIM replacement. 

eUICC enabled eSIMs/ SIMs are a common point of discussion these days. But, did you know that starting with an eUICC enabled SIM/ eSIM requires perfection in many ways?


There is a wide range of cellular modules to choose from. Cellular modules from the vendors like Quectel, SIMCom, Ublox, Telit, Thales, etc. are needed for any IoT device to get connected to a cellular network.

Not all modules are compliant towards eUICC functionality. This functionality enables you to change connectivity service provider Over-The-Air (OTA), without SIM/ eSIM replacement. Why would you need that?

We hear many stories from companies deploying Internet of Things (IoT) devices into the field. Roaming agreements between service providers change leading to limited connectivity support or increased connectivity prices. Several mobile operators are shutting down 2G and 3G networks. In such cases, if the cellular module does not support eUICC functionality it is impossible to change the connectivity provider remotely  and the only remaining option is to recall or replace the device or SIM/ eSIM. In case you have been using the embedded SIM (eSIM) soldered into your device printed circuit board (PCB), it is a costly engineering challenge.


Before selecting and ordering cellular modules ensure that it supports eUICC. Further, think and evaluate if 2G would pave the way or if 3G, 4G, LTE-M or NB-IoT would be required, or multi-frequency support is required as often seen with LTE-M and NB-IoT where users usually look for fallback support on 2G, 3G or 4G. Finally, pay attention to regional frequencies supported by the modules, some have global support, others not. 


Think about your short-term, mid-term, and long-term business requirements. Do not build a product primarily focused on technology. Business case and business strategy come first, technology is just an enabler to deliver that strategy. If you are building an IoT device with a service aimed at your local country, then you are operating without the business plan to reach out to foreign clients.

Build a global IoT business and integrate eUICC SIM/eSIMs from the beginning.

If your aim is to serve the local market, then the most important question you should raise is if your local connectivity service provider is offering you countrywide connectivity support with an acceptable price. You might have a device which is sold to serve in a static, non-mobile environment like smart meters or it might be a mobility solution like in-asset tracking, pet tracking and livestock management. In both cases but especially in the latter, it is beneficial to have multi-operator support to reduce the cost of multiple stock-keeping units (SKU). Also, multi-operator connectivity support gives you better connectivity coverage reach in case of non-supported shadow areas of cellular connectivity. Always remember no mobile operator can offer 100% countrywide coverage, there are always gaps in coverage. 

Various connectivity service providers offer different pricing options. Firstly, fixed monthly costs for each active SIM regardless of data / SMS consumption. This cost relates to SIM management, network resources linked to the cellular network and the corresponding connectivity profiles reserved for your SIM card.  Secondly, there are offers that include minimum monthly consumption regardless of how much data has been consumed. Thirdly the data consumption that is often referred to as megabyte (MB) per month, but also high consumption cases where Gigabyte (GB) or Terabyte (TB) usages are common. Some connectivity service providers also offer pooled data usage packages which can be shared among the SIM cards included in the bundle/pool. Finally, there are both prepaid and postpaid options, where often the prepaid options have cost savings.


  • First, estimate your data consumption per SIM per month. 
  • Your geographical needs such as local, regional or global
  • No single provider in the world can serve the whole market alone or fulfill your 100% requirements and therefore eUICC enabled SIMs/eSIMs with right connectivity orchestration service play a key role. Remember,  eUICC enabled SIMs/eSIMs with compliant cellular modules is not enough. There are other key requirements before you can take full advantage like connectivity orchestration service including connectivity and subscription management.


Did you hear from someone that by using an eSIM you can change your connectivity provider remotely without changing the physical SIM card. Wrong!

To change the connectivity provider following key requirements must be supported.

  1. Cellular modules need to support eUICC. A “Yes” as an answer from the module vendor is not enough as on many occasions we have found modules to be non-compliant. It must be tested and approved on a service that you as a client are going to buy from a service provider that you wish to buy from. 
  2. The SIM card needs to support eUICC. There is information circulating in the market that to have eUICC support MFF2 SIMs i.e. embedded SIMs or eSIMs need to be used. There is no relation between the SIM card form factor and eUICC. eUICC can be supported in any physical or virtual  format including standard plug-in SIMs and in embedded MFF2 SIMs.
  3. To change the connectivity profiles there is a need for a Remote SIM Provisioning (RSP) platform. 
  4. Having all the previous key requirements supported is useless if there is no connectivity switching service available between the mobile operators. This is the ultimate requirement. Once all these 4 key requirements are supported you are ready to use a connectivity insurance for your own future cellular connectivity needs. Having connectivity insurance is a great competitive advantage while selling your IoT devices to customers.


There are various use cases where embedded SIM is not needed and standard plug-in SIM could pave the way with eUICC support. So, if you already have an IoT device with a standard plug-in SIM holder, start with this and ensure all four key requirements are fulfilled to get connectivity insurance prior to moving forward with high volume deployments. 


Service, service and service. If you’re still convinced that your current connectivity provides all these 4 key requirements, ask them the following simple question. “Should I switch to another connectivity provider today, which connectivity provider I can switch to and how much it will cost?”

  • If you can’t switch today, you are locked by technology and lack of service.
  • If the switching costs you unreasonably, you are locked by commercial feasibility.

Choose ConnectedYou’s eUICC enabled SIMs/eSIMs and avoid supplier lock-in.

ConnectedYou was created with a mission to “Democratise IoT Connectivity” by solving real problems and needs. ConnectedYou is a digital marketplace for all your connectivity service orchestration needs. We orchestrate the critical components that include - eUICC-enabled SIMs/ eSIMs, global IoT/ M2M connectivity, unified monitoring & management, and remote SIM provisioning capabilities into a single solution as a one-stop-shop. Here’s why our product is the best solution for your enterprise - 

  • The largest network of 2G, 3G, 4G, 5G, LTE-M, and NB-IoT networks 
  • Connectivity for countries with permanent roaming restrictions
  • Transparent Pay-As-You-Go pricing without hidden charges or minimum commitments
  • Single contract enabling hassle-free multi-supplier sourcing without lock-ins with any connectivity provider
  • Unified platform to manage your IoT/ M2M SIM cards irrespective of the connectivity supplier
  • Capability to switch connectivity suppliers remotely without SIM replacement and  without any additional transaction costs
  • Central support desk for all connectivity issues

Contact us at to get your real connectivity insurance in place.

People Also Ask

Question 1: What is the role of SMDP?

Answer: For over-the-air installation within the SIM, operators use this Subscription Manager Data Preparation (SMDP) to securely encrypt their operator credentials.

Question 2: What is SMSR?

Answer: Once the operator credentials have been installed, this entity remotely manages the SIM to enable, disable, and delete the credentials as needed for the duration of the product. Subscription Manager Secure Routing (SMSR) securely transmits the encrypted operator credentials to the SIM.

Question 3: Are MNOs open to adopting eUICC?

Answer: Disintermediation made possible by eUICC will create new addressable markets. Customers can also change suppliers overnight, for example, a big fleet of commercial cars. For MNOs, this obviously poses both a huge potential and a risk. They will need to come up with new strategies to retain clients, such as providing a stronger package of services. Market acceptance already exists. From consumer electronics and wearables to automobiles, as well as more conventional industrial IoT use cases like payment terminals, security systems, and metering applications, we observe traction in a number of vertical industries.

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