Pi 3 Wifi Finding Networks but Not Connecting

[8.5lbATwin]

I have a Pi 3 Model B and it is having some wifi issues. The big problem I am having is that it won't CONNECT to my home wifi network. I will state here that I downloaded this version of Raspbian Jessie (regular, not lite) yesterday evening and did a fresh install. The wifi will be able to see all of the networks in my apartment building, and I can select a given wifi network, then it will prompt me for a "Pre Shared Key" where I put in my network password. Nothing happens after that. It doesn't connect or anything. I did a little digging and it turns out that my wifi router, which is also my modem, is a WEP connection, not a WPA which is more modern. I don't know if this is the main problem. I tried trouble shooting this issue by using my phone as a wireless hotspot. with my phone setup as a hotspot, I was able to find and connect my Pi 3 to it. The little wifi logo came on in the upper right hand corner of the screen and I thought everything was hunky dory. WRONG! It was telling me that I had a connection through the hotspot, but I STILL didn't have internet. I wouldn't be able to access any webpages or do updates even when the wifi meter was all blue. I thought, "okay, maybe it is something that is up with my phone." So I tried hooking up my Nexus Tablet to the hotspot of my phone. It worked flawlessly, but the Pi 3 still would not get internet. I am at a loss of what to do next or where to go with this. I have been reading up and down forums, most of which are old, but no one seems to have this issue. Does anyone out there know of any solutions? I should also mention that if I do have the ethernet cable plugged in, it DOES work. I suppose I could always use it with an ethernet cable, but I would really like to get the wifi up and running too. Could it be a manufacture defect? I placed my order before it came out so I got an early batch. I don't know if that would effect the product's quality. You might be asking yourself, "If you got it a couple of months ago, why are you just setting it up now?" I don't have a good answer for you, I was just busy with other things and finally got around to hooking up my Pi 3 this week.

[SonOfAMotherlessGoat]

<WOT OFF>

Have you configured your router to be a DHCP server, or are you statically setting the IP and DNS on your Pi? If it's getting a connection, but you are unable to browse try doing the following:

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ping 8.8.8.8

If that is okay, then you have DNS issues, check that with

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ping google.com

Lastly, what does your /etc/resolv.conf file contents look like (on the Pi)

[klricks]

WEP will not work unless you manually edit the config file.

If at all possible change to WPA2 and it will just work. WEP is like no security at all these days.
If you must.... Somewhere in this thread there is a hint of how to set up WEP: viewtopic.php?f=91&t=140213&hilit=+wep#p939667