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Since the Nexus S, Google brought out the Galaxy Nexus, Nexus 4, and Nexus 5.
Since the question doesn't specify what Nexus the person is comparing it to the Nexus S, here's the order of Nexus phones (and by manufacturer) to date: -HTC Nexus One -Samsung Nexus S -Samsung Galaxy Nexus -LG Nexus 4 -LG Nexus 5
The ISBN of Nexus - comics - is 1-59307-398-4.
no it is a phone
You would set it up through whichever carrier network you have your Nexus 4 connected with.
No, the Nexus wireless charger does not have an internal battery. It requires the micro USB charger for it to wirelessly charge a Nexus 7 (or Nexus 4 or 5).
Both phones are manufactured by LG, and they largely have the same architecture. Some of the differences is the G runs on an LTE network (Nexus 4 is HSPA+), has an expandable microSD slot (Nexus 4 has no expandable slot), has a removable battery (Nexus 4 battery is sealed), a 13 megapixel camera available (Nexus 4 only has a 8 megapixel camera), and runs on Android 4.1 Jelly Bean with a manufacturer skin (Nexus 4 has Android 4.3 Jelly Bean stock).
It's unlikely. If and when the Nexus 5 comes out, the remaining supplies of Nexus 4's will be sold out to make way for the next generation device.
Nexus 4
The Nexus 4 has been discontinued. It can be purchased used for around 100 USD.
Typically, when a device is fairly new, there's contests and deals out there to win that device. But with the Nexus 5 in the near horizon, it's unlikely you will find any contests anymore to win a Nexus 4.
I believe the Netgear PTV3000 and the LG DWD-300 are two that work on the Nexus 4.