Modem operation principles in Kindle 3 Wi-Fi+3G

Question

Amazon Kindle

Good day, comrades!
As you know, Kindle 3 Wi-Fi + 3G allows you to use 3G / EDGE / GPRS Internet connection in more than 100 countries, based on an agreement between Amazon and providers.
However, it would be very interesting to know on what basis providers provide free access. How do they identify devices? By the unique ID of each built-in modem? By browser version?
And a purely theoretical question: if users know the principles of identification, is it possible to emulate a modem, or flash it, or physically remove it for later use in conjunction with a PC?
State your opinion on this matter!

Answer 1

www.mobileread.com/forums/showthread.php?t=60006
www.mobileread.com/forums/showthread.php?t=103972
www.mobileread.com/forums/showthread.php?t=102240
there is a SIM there.
everything has to go through the Amazon web proxy servers. All other connections are blocked.
If you're in a region which doesn't give you free web access via 3G on your Kindle then all you can access is the Kindle store and Wikipedia.

Answer 2

Yes, like all phones, probably: there is a SIM card, there is IMEI.
In general, Amazon has the right to use a candelabra for such tricks. And domestic Kindle buyers will support him in this :-)

Answer 3

The sim is there. Infa 100%.

Answer 4

There is a SIM card inside the Kindle, look at the pictures of the disassembled device.