To find the password for it, plug a computer into the router with a network cable. Then open a web browser on the computer.

The instructions that came with the router, should tell you an address to type into the browser. Likely, 192.168.1.1 or 192.168.2.1. The last 2 numbers are usually 0, 1, or 2.

If you enter a successful address, you'll either be prompted for an admin password for the router, or a web page detailing the router's settings. The password (if it hasn't been changed), can be found in the printed manual (or pdf) from the manufacturer. If all else fails, try "admin" for both username and password.

Once in to the router's internal web page, look around for "wireless" or "802.11" settings. You'll eventually stumble upon something like "WEP key", followed by possibly number and letters from a-f. Copy these down, and try entering them on your tablet.

We'll you need to know your password to AppStore