What might me important for some reader: shutting off 2G services means that you won't have telephone voice services, if your operator doesn't support voLTE.
No, there's also 3G as well, remember. My phone allows 2G, 3G, 2G and 3G, 3G and 4G, or 2G and 3G and 4G network selections in its settins menu (Android 7, Sony)