[zinekeller]

Depends? Amazon's SIMs are locked to the specific Kindles, so you need to clone at least the radio identification codes (like IMEI) that is used, and you need to relay that to a specific proxy operated by Amazon because the network-in-question would block (on behalf of Amazon) other servers.

I imagine that in case someone has implemented this, it would be locked in a similar way to ensure that it can only access those ad servers and nothing else.