These options allow the technologies. 2G is just 2G and nothing else. With 3G it’s 2G/3G with 2G as fallback option. Like that you have 2G/3G/4G/5G and disabling 2G switches to 3G/4G/5G.
In this case it just stays on 2G because there’s no way to subtract it into nothing. Although perhaps I just influenced it by observing it ¯\_༼ •́ ͜ʖ •̀ ༽_/¯
Edit: Falls back to the last valid option in the background. If 2G only was first, it ends up using that, if this was toggled first, it returns from previous selected network type.
I guess it would “fallback” to 3G since 2G isn’t available?
Fallback on Android only works one way.
These options allow the technologies. 2G is just 2G and nothing else. With 3G it’s 2G/3G with 2G as fallback option. Like that you have 2G/3G/4G/5G and disabling 2G switches to 3G/4G/5G.
In this case it just stays on 2G because there’s no way to subtract it into nothing. Although perhaps I just influenced it by observing it ¯\_༼ •́ ͜ʖ •̀ ༽_/¯
Edit: Falls back to the last valid option in the background. If 2G only was first, it ends up using that, if this was toggled first, it returns from previous selected network type.