Any details?
Had tried working with an ATT hotspot and a regular Almond without luck.
It was a very simple set up and went without a hitch, according to the T-Mobile Cell Spot instructions. There is a GPS antenna connected to the device and this needs to be placed at a window. So, this limits where you might locate it. Once it is connected and turned on, it downloads and uploads for several minutes (instructions state it could take up to 2 hours). It improved my cell service inside my house in a major way: from getting 1 to 2 bars to being able to get 4 to 5 bars, depending on how close I am to the device. I am very impressed with it.
Let me know if you need anything further.
Elliott