When an IoT device tries to connect to a 2G, 3G, 4G-LTE, Cat-M, 5G or NB-IoT wireless cellular network, the network needs some way to uniquely identify the device. This is where the SIM (Subscriber Identity Module) card comes in. This SIM card happens to be also known as an M2M SIM card, which stands for “machine-to-machine” SIM card. IoT Data Plans are the standard monthly billing mechanism for IoT SIM cards. First understand what is an iot sim card in detail.
An IMSI (International Mobile Subscriber Identity) number is used by the SIM card. Each and every connected device, online or offline, has its own unique identifier. To communicate identity information to a built-in cellular modem, SIM cards can also run software applications. The SIM card’s accompanying software is known as UICC, and the acronym is often used as if it were the name of the SIM card or chip. The Subscriber Identity Module (SIM) card is a smart card.
International SIM (Subscriber Identity Module) cards come in two distinct flavours:
To provide access to a single network in each country or region visited, the old-fashioned SIM model relies on partnerships between the home provider and providers located in other countries (also recognised as roaming SIMs). It is rare for these SIM cards to provide the connectivity and reliability required to run IoT deployments smoothly. This is due to the absence of backup networks in the event of an outage or a change in the terms of the partnership. Moreover, the organisation rolling out the M2M gadgets has no say over which networks the gadgets should use.
Currently, the most cutting-edge SIM model employs what are known as Multi-IMSI SIMs. The SIM profiles on these cards can hold multiple IMSIs. While each IMSI can open the door to dozens or hundreds of networks, these SIM cards only need one SIM profile. In a nutshell, this yields a merged list of networks that give M2M and IoT solution providers the necessary latitude and authority over their offerings.
There is a wide range of shapes and sizes from which to choose when shopping for an IoT SIM card.
Similar to the SIM cards found in mobile devices like smartphones and tablets, IoT SIM cards can be found in mini, micro, and nano sizes. These are not unique to WiFi-only gadgets but can be found in any device that also has cellular data access.
For many IoT gadgets, especially the more compact ones like wearables, the current SIM card sizes are still impractical. The most typical SIM card format for industrial use is the embedded SIM, which is directly mounted and pre-soldered onto the PCB. SIM cards, which can be swapped out and replaced, represent the standard form factor. The most typical form factor for embedded SIMs is the MFF2, which is a 6 mm x 5 mm microchip that is soldered onto your circuit board.
Which devices can be found in the Internet of Things?
The sizes and forms that objects connected to the Internet of Things can take are practically endless. In the context of the Internet of Things (IoT), any piece of hardware that can connect to the internet and transmit information about itself or its immediate surroundings is considered an IoT connected device. Utilities, energy, retail, manufacturing, real estate, transportation, logistics, public sector, banking, insurance, agriculture, smart farming, and transportation are just some of the many industries that use IoT-connected devices.