Only if you had bought one with cellular service through a carrier. Wifi-only versions of the Nexus 7 don't have that issue.
Yes, credit cards are universal.
There are various types of Nexus devices, but the Nexus 7 is part of that same family.
The 2012 Nexus 7 came out on July 2012. The 2013 Nexus 7 came out on July 2013.
If you buy an LTE version yes. If you buy wifi only then no.
Yes, the Nexus 7 (2013) is Bluetooth Smart Ready certified. The 2012 Nexus 7 supports traditional Bluetooth.
The 2012 Nexus 7 debuted on July 2012. The 2013 Nexus 7 debuted on July 2013 (August 2013 in Canada).
The Nexus 7 is an Android Tablet made by Google. It has a screen size of 7 inches.
In the 2012 Nexus 7, it came with a single camera (in the front). The 2013 Nexus 7 has two cameras, one in the front and one in the back.
If you buy the Nexus 7 online, you may have to pay for shipping costs, which you wouldn't have to at a Staples store. Also, Staples has online deals that may be cheaper than getting it from their stores directly.
The Nexus 7 is the better tablet.
Nexus 7 tablet 2013 Has a front and rear Camera.