Cateycate, I wouldn’t be surprised if the issue is actually your AT&T U-verse gateway modem. AT&T equipment is garbage. Comcasts built-in Wi-Fi is garbage as well but it’s much better than ATT.
You will get much better WiFi speeds from a dedicated Access point. (Not a wireless router)
Here is one that I strongly recommend: https://tinyurl.com/yd2ljs6m (the cheap one is fine)
Keep in mind that AT&T internet speeds are quite a bit slower (unless you are one of the rare folks that get fiber) than cable internet. And because it is really just DSL with some hokus pokus in the background to get over the 1.5MB speeds there could be speed issues.
I would try your jibo on another network (friend or neighbor) if that is an option to see if you have better luck. This would nail down where the problem is.
Please understand that I am only offering my opinion, if in doubt please contact Jibo support for official answers.