We currently have this line under the off-topic things in the FAQ:
- Android-independent phone questions, such as "Does Carrier X have prepaid plans?"
I think that specific example is definitely out of our scope; how you pay for your service isn't a core part of your device or of using it.
On the other hand, we (myself included) have been somewhat inconsistent with hardware questions that aren't limited to Android devices. How your battery capacity affects battery life and similar concerns apply to lots of electronics, but nonetheless can be very important to Android users.
Again I think carrier-related questions and that sort of thing should be continue to be off-topic, we've had that discussion. But what should we do about these hardware-centric questions? I think we have the expertise to answer them and, due to their relevance, they should be on-topic. Other thoughts?