In my experiences in Sweden and the Netherlands, it's a struggle to use T-Mobile's 2G international data to perform simple tasks, even using Maps and sending messages on Signal.
I just came back from Europe and opted to pay for the upgraded international T-Mobile plan since 2G is barely usable. LTE was around $35 for 15gb. It was way more useful than 2G but it also felt like I wasn't getting full LTE speeds for some reason.
