The 3G4G Blog

It's been a while since we created our security tutorial , back in 2018. One of the items we discussed in there were the fake cell tower...

At DEF CON 31 last year, Tracy Mosley, Vulnerability Researcher at Trenchant presented a talk titled "Nothin’ but a G Thang - The Evol...

As discussed in our earlier post, the long-standing 2G cellular standard for rail communication, known as the Global System for Mobile Comm...

You have probably heard me a complaining about the pace of VoLTE rollout, 2G/3G shutdowns, 4G Voice roaming, etc. This post highlights all t...

eCall (an abbreviation of "emergency call") is an initiative by the European Union , intended to bring rapid assistance to motoris...

The GSMA Mobile Economy report series provides the latest insights on the state of the mobile industry worldwide. Produced by GSMA's in...

I have been meaning to write on this topic for a very long time. The discussion started back in 2016 when the limitations of GSM-R were obvi...

When we made our little Open RAN explainer , couple of years back, we never imagined this day when so many people in the industry will be ta...

I wrote this blog post '2G / 3G Switch Off: A Tale of Two Worlds' back in Oct 2017. Since then I have continued to see the same ...

The  GSMA Mobile Economy 2018  report forecasts that 2G will still be around in 2025 and the dominant technology will be 3G in Africa....

CW (a.k.a. Cambridge Wireless) held a very interesting event titled ' Time for Telecoms ' at the Science Museum in London. I man...

I recently did a small presentation on 3GPP Security, looking at the how the security mechanism works in mobile cellular networks; focus...

More than 23,500 patents have been declared essential to the GSM & 3G as shown in the picture above. I am assuming this includes 4G ...

Here is a quick tutorial on mobile network sharing approaches, looking at site/mast sharing, MORAN, MOCN and GWCN. Slides and video embe...

Looking back at my old post about UMTS & LTE (re)selection/handovers, I wonder how many different kinds of handovers and (re)selection...

Source: Wikipedia 2G/3G switch off is always a topic of discussion in most conferences. While many companies are putting their eggs in...

I have seen many people wondering if so many different types of IoT technologies are needed, 3GPP or otherwise. The story behind that ...