CellSIM M2M Specification

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CellSIM M2M supports several secure MCU families, two main temperature classes: standard class TS (up to 85°C) and extended class TB(up to 105°C). CellSIM M2M fully supports Global Platform requirements, Java Card virtual machine, high-speed OTA download protocols and offers for end users memory sizes spanning from 64 Kbytes up to 300 Kbytes.

Software features

CellSIM M2M fully implements Java Card 2.2.1 and GlobalPlatform 2.1.1 specifications with a number of optional configurable features.The CellSIM operating system was originally designed to fit the 2G and 3G markets and was extended to include modern LTE features.

In addition, CellSIM M2M provides following features:

Supported Voltage Classes

A, B, C (5V, 3V, 1.8V)

Communication Protocols


Speed Enhancement

Up to 250,000 Bauds at 4 MHz

Logical Channels


Dynamic File System


Authentication Counter


SIM API Version

3GPP TS 43.019 Release 5

UICC API Version

ETSI TS 102 241 Release 6

USIM API Version

3GPP TS 31.130 Release 6

ISIM API Version

3GPP TS 31.133 Release 8 (optional)

Transaction Buffer Size

4 KB (default)

Custom Flash loader with OS reloading capability


File and object journaling


File Security Attribute Formats

Expanded, Referenced,

Referenced with Security


Security Environments

Yes, according to ETSI TS 102 221 Release 6

Authentication Algorithms

COMP128-1, COMP128-2, COMP128-3, Milenage

Over The Air (OTA) file system management, applets management and private application data management are supported through the OTA application which is based on ETSI TS 102 225 and ETSI TS 102 226.

Following operations are supported:

  • File system management include, but are not limited to, network connectivity information and subscription provisioning.
  • Applet management including remote uploads installation and removal of applications without physically accessing the device.

Such operations are performed with a proper minimal security level which is configurable per used OTA RFM or RAM applets. 

Java engine of CellSIM M2M makes it possible to run applet applets securely and implement different data processing routines including data collection from the board in which the wireless module is inserted, data encryption or digital signing.

By default, the CellSIM M2M supports main Network Authentication Algorithms for both 2G and 3G network systems: COMP 128-1,2 and 3 and Milenage including such options as Generic Bootstrapping Architecture (GBA).

Regardless of the algorithm, the CellSIM M2M implementation is protected against most security attacks: a counter limits the number of authentication to a MAX-VALUE defined by the customer and HW/SW countermeasures are in place to prevent SPA/DPA attacks to be effective.

Full support of Global Platform requirements makes it possible to do management of applets in the secure way.

Global Platform

Global Platform (GP) Version



Yes (option)

Visa Open Platform Java API


GP Delegated Management

Yes (optional)

GP Data Authentication Pattern

Yes (optional)

Supplementary Security Domain Support

Yes (optional)

SCP02: Authentication (i=15)



Yes (optional)


Yes (optional)

Terms of Usage

Privacy Policy

This privacy policy sets out how Cellnetrix uses and protects any information that you give Cellnetrix when you use this website.

Cellnetrix is committed to ensuring that your privacy is protected. Should we ask you to provide certain information by which you can be identified when using this website, then you can be assured that it will only be used in accordance with this privacy statement.

Cellnetrix may change this policy from time to time by updating this page. You should check this page from time to time to ensure that you are happy with any changes. This policy is effective from 01.01.2011.

What we collect

We may collect the following information:

  • name and job title
  • contact information including email address
  • demographic information such as postcode, preferences and interests
  • other information relevant to customer surveys and/or offers

What we do with the information we gather

We require this information to understand your needs and provide you with a better service, and in particular for the following reasons:

  • Internal record keeping.
  • We may use the information to improve our products and services.
  • We may periodically send promotional emails about new products, special offers or other information which we think you may find interesting using the email address which you have provided.
  • From time to time, we may also use your information to contact you for market research purposes. We may contact you by email, phone, fax or mail. We may use the information to customise the website according to your interests.


We are committed to ensuring that your information is secure. In order to prevent unauthorised access or disclosure, we have put in place suitable physical, electronic and managerial procedures to safeguard and secure the information we collect online.

How we use cookies

A cookie is a small file which asks permission to be placed on your computer's hard drive. Once you agree, the file is added and the cookie helps analyse web traffic or lets you know when you visit a particular site. Cookies allow web applications to respond to you as an individual. The web application can tailor its operations to your needs, likes and dislikes by gathering and remembering information about your preferences.

We use traffic log cookies to identify which pages are being used. This helps us analyse data about webpage traffic and improve our website in order to tailor it to customer needs. We only use this information for statistical analysis purposes and then the data is removed from the system.

Overall, cookies help us provide you with a better website by enabling us to monitor which pages you find useful and which you do not. A cookie in no way gives us access to your computer or any information about you, other than the data you choose to share with us.

You can choose to accept or decline cookies. Most web browsers automatically accept cookies, but you can usually modify your browser setting to decline cookies if you prefer. This may prevent you from taking full advantage of the website.

Links to other websites

Our website may contain links to other websites of interest. However, once you have used these links to leave our site, you should note that we do not have any control over that other website. Therefore, we cannot be responsible for the protection and privacy of any information which you provide whilst visiting such sites and such sites are not governed by this privacy statement. You should exercise caution and look at the privacy statement applicable to the website in question.

Controlling your personal information

You may choose to restrict the collection or use of your personal information in the following ways:

  • whenever you are asked to fill in a form on the website, look for the box that you can click to indicate that you do not want the information to be used by anybody for direct marketing purposes
  • if you have previously agreed to us using your personal information for direct marketing purposes, you may change your mind at any time by writing to or emailing us at office@cellnetrix.com

We will not sell, distribute or lease your personal information to third parties unless we have your permission or are required by law to do so. We may use your personal information to send you promotional information about third parties which we think you may find interesting if you tell us that you wish this to happen.

You may request details of personal information which we hold about you under the Data Protection Directive (95/46/EC) . 

If you believe that any information we are holding on you is incorrect or incomplete, please write to or email us as soon as possible at the above address. We will promptly correct any information found to be incorrect.


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