Case Studies

Programming Virtual SIM Cards for Switching between Mobile Operators

CHALLENGE
Develop and install a Java application directly onto a SIM card on a cell phone. The application changes the current mobile operator by rewriting a secure identifier on the SIM card.
The switching process is managed remotely by a web service where a user can change a mobile operator through web interface.
SOLUTION

Byndyusoft found two solutions for this challenge:

  1. Create a special mobile phone that can rewrite information on a SIM card
  2. Use a JavaCard for switching a secure identifier inside its own card by a Java Applet.

We bought and tested hardware and software for low-level SIM card programming. Both of these solutions were implemented and demonstrated in a real life environment.

A user can choose a mobile operator remotely, buy a new mobile service, and change the current mobile operator to a selected one via a web service or a mobile application.

RESULTS

An application for a SIM card and a web service were implemented and tested successfully.

A car service company and a bus service company are using SIM cards to navigate and connect to the Internet. As an owner you can link a geographical location to the cheapest mobile operator in a particular location. The web service will automatically switch a mobile operator depending on the location of the car or bus.

Infinite times
to rewrite a mobile operator on one SIM card
One SIM card
needed for as many operators as you want
Only one minute
for switching between mobile services
Hardware · Java · Low-level Programming · Web
From my experience, I can say that a good many times I tried to give a full statement of work to the contractors, but in the course of work it always turned out that something important was left behind. During the cooperation with ByndyuSoft, instead of long negotiations on SOW, we executed projects according to Agile with regular releases not less than once a week.
Sergey Mikhaylov, CTO at Neiron SIM, Moscow
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