I'm getting my phone service through a medium sized company in my country, which means they have their own LTE network (called ice+). With my current plan I have practically free use of this network, but in the cases I can't find that network, my phone will automatically connect to their backup one (called ice, which I believe they access through a cooperation with a larger company), of which I have a small limit on data usage. This has been working out great for the past half year, but recently my phone has started changing the network operator from ice+ to ice randomly, even though I know it has access to ice+ (it will change to and stay on ice when I'm at home, even though the phone has been lying in the same place the whole time). Even if I manually select ice+ (which takes a few minutes to find because of searching), the phone will automatically change back to ice without me touching it at all.
Because of this I need a way to lock my phone to ice+, so I won't have to deal with restricted access and high bills, which should be completely unnecessary. Does someone know how I could do that, if there's something I can change in the APN settings, or maybe some app I can download that will do it for me? Even something that will check the network and automatically change back to ice+ would be okay, if not as convenient.
For reference I use an LG G6.
