I used 2g network, once I using network, after that it didn't opened?

[AC Question]

I used 2g network of Telenor, Once after usage of this network closed. When next time it is not activated, I used latest Marshmallow os. When I opend 3g sim activatation, 2g network activated after closer of 3g sim.

 

[Ravindra Parripati]

My new phone Infocus latest os of Marshmallow, 2 sim are there, one sim for 2g net work another 3g/4g. When I used 2g network. I closed after usage of this network, If necessary I open 2g network It does not opened. Please solve my problem. I observed after closing of 2g network, If 3g network activated, [and closing it], the 2g network will be activated.

 

[B. Diddy]

Welcome to Android Central! Sorry, can you clarify--did you also create the original post of this thread?