Vodafone was the first to announce that it would be cutting off its 3G network. This was followed by NOS and Altice, who also announced the dates for this operation. If you are an Altice / MEO or NOS customer, you will know when you will not be able to access the 3G network.

3G: Altice will be the first company to segregate the network
3G (third generation) is a mobile communications technology that succeeded 2G (second generation) and brought significant improvements in terms of data speed and information transmission capacity.  It was launched in the early 2000s and marked a milestone in the evolution of mobile networks.  3G download speeds ranged from about 384 Kbps to 2 Mbps.  The technology has also introduced new features such as video calling, video conferencing, and improved audio and video quality.
a Altis It will be the first operator to turn off the 3G network.  According to the info on their website...

We reinforce our commitment to availability, quality and close access to the most advanced technologies throughout the national territory, through 4G and 5G networks, with greater coverage, speed and capacity.  Therefore, to offer you the best services and the most innovative solutions, we will gradually stop 3G technology, in voice and mobile Internet services, between09/04/2023 and 01/31/2024.


Altice also states that “With the shift from 3G to 4G technology, customers can experience download speeds up to 5 times faster, and even more with the shift to 5G (up to 72 times faster).”  The following map shows the national 3G shutdown plan.


NOS revealed that it will start the process of disconnecting the 3G network from the middle of next year.  A contact with all information will be posted soon.