Product setup was straightforward for the most part. Reading the instructions clearly and more than once is recommended.
Product should work for GSM networks easily, but I was not able to test.
Did not work with my CDMA hotspot network because I believe this product would not opperate on the same LTE MHZ as my network hotspot did, even though it worked on the LTE BAND.
So it is VERY IMPORTANT that the LTE MHZ is exactly what your hotspot network runs.
