When will Holorgram sunset 2G???
Hologram will support 2G as long as the carriers they partner with support 2G. Hologram doesn’t have their own towers or cellular network, they partner with carriers that do own towers to accept devices with Hologram simcards.
So for example, in the US Hologram will support 2G up to the day T-mobile shuts down their 2G towers, then hologram will no longer support 2G in the US. The best way to determine your risk is look at which carriers Hologram has agreements with in the regions you care about and look at those carrier’s plans to sunset their 2G network.