Commuting by train in rural Germany, I am looking for a provider that can give me usable data connections throughout my trip. So I'll have to consider 3G and 4G coverage from four different operators. I would be ok with restricting my Android data setup to only consider 3G networks, if that reduces pauses during handovers. My main goal is continuous coverage in any one network.
I'm not too keen, however, on buying four throwaway SIM cards and making eight roundtrips while staring at the signal strength indicator.
Is there any software I can install on an Android device that takes measurements of network communication across all networks?