Sim2 on Lumia 540 supports only 2G after Windows 10 update?

[Windows Central Question]

Sim2 on lumia 540 supports only 2G after windows 10 update

After an update from windows 8.1 to 10 on lumia 540,the sim2 only supports 2G not 3G

 

[Mikeb99]

The same applies to the 640 too. Not very smart as there are now networks that no longer provide 2G but only have 3G and 4G. Not sure whether this is a bug or a feature. Any ideas anyone?

Mikeb

 

[pdaneophyte]

The SIM that do not provide data connection is held to 2G network only. ******** isn't? I think this counts as a *feature*, a battery saving one.