Question: Is there a way to restrict which mobile networks my phone will connect to?
Device: Google Nexus 5 32gb, Stock Rom/Kernel with Root access
I'm switching to a T-Mobile Simple Choice plan with free 2g data in 100 countries, and going on a cruise shortly after. A couple of the ports of call are on the list, while others are not on the list. It sure would be nice to just leave my phone on and have it only connect to the free networks. I contracted T-Mobile and was pointed to a document letting me know that I will be notified if charges are incurred, but I'd rather not get charged at all. This I could solve manually by carrying the list of countries with me and only turning off airplane when I am there, but that does seem like a pain to me.
The other problem, cruise ships have cell networks onboard now. These networks are charged as international and not included in the Simple Choice deal. Even if I am in port, I am concerned I may still connect to this netowork. I imagine there is an app I could use to at least see which network I am on (I can't find it indicated in Settings anywhere - probably blind), but I would need to prevent my phone from roaming onto that network when both are in range.
I'd really appreciate any thoughts/suggestions. The only thing I can think of is some kind of custom block that would like me restrict network connections. All way over my head.