I have a keyboard 3G on v3.4.3 and the cell connectivity does not work anymore. It does still mention in the device info that it has 3G capability but if you try to do anything requiring a network connection it prompts you to connect to wifi. (Interestingly it also has the cell-style right triangle with five bars to indicate signal strength.)
I recall Amazon announcing a few years back that it would stop working; not sure if they pushed a firmware update, stopped paying the bill, or if 3G just isn't available anymore.
I recall Amazon announcing a few years back that it would stop working; not sure if they pushed a firmware update, stopped paying the bill, or if 3G just isn't available anymore.