The 3G4G Blog

Back in 2022, I wrote about the transition from the original eCall system to Next Generation eCall, or NG eCall. At the time, one of the bi...

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...

I have argued a few times now that it would make much more sense to be able to make access and core independent of each other. 3GPP 5G Stand...

GSMA recently published updated " 5G Implementation Guidelines: SA Option 2 ". It explains the two types of SMS in 5G, the sam...

The 10th Annual HITB Security Conference took place from the 6th till the 10th of May 2019 in The Netherlands. The theme for the confer...

I recently did a 4G voice presentation for beginners after realizing that even though so many years have passed after VoLTE was launched...

Phil Sheppard, Director of Network Strategy & Architecture, Three UK was the keynote speaker of LTE Voice Summit held in London this...

I have been covering the LTE Voice Summit for last couple of years (see here: 2015 & 2014 ) but this year I wont be around unfortunate...

Came across this presentation by Eir from last year's LTE Voice Summit . VoWLAN: Call Quality from 3G4G As the summary of t...

Last year's summary of the LTE voice summit was very much appreciated so I have created one this year too. The status of VoLTE can...

There was an interesting discussion on different roaming scenarios in the LTE Voice Summit on 29th, 30th Sep. in London. The above pictu...

VoLTE is a very popular topic on this blog. A basic VoLTE document from Anritsu has over 40K views and my summary from last years LTE Voi...

Sometimes its good to take a step back and look at the new applications and services that are already happening or may be happening sometim...

VoWiFi is certainly a hot topic, thanks to the support of VoWiFi on iPhone 6. A presentation from LTE World Summit 2014 by Taqua on this t...

VoLTE has been a very popular topic on this blog. My overview of the LTE Voice Summit missed out narrowly from the Top 10 posts of 2014...

On 4th Nov. 2009, the One Voice initiative was published by 12 companies including AT&T, Orange, Telefonica, TeliaSonera, Verizon, ...

Codecs play an important role in our smartphones. Not only are they necessary and must for encoding/decoding the voice packets but they inc...

One of the changes that I have noticed in the last year is that some of the operators who have been opposed to WiFi in the past have not...

Voice over LTE or VoLTE has many problems to solve. One of the issues that did not have a clear solution initially was Roaming. iBasis h...