unlocked hotspot device capable

An unlocked mobile hotspot (and mobile router) device that is capable of GSM and CDMA and receive updates from netgear would be great. The thought of having to buy two or three mobile hotspot when switching cellular companies isn't ideal to me. 

I noticed the u.s. designed mobile hotspot devices are always locked to a carrier, but there has never been an unlocked version.

There isn't a netgear designed hotspot for t-mobile, but can use their sim card in an unlocked AT&T hotspot device or any GSM sim card for that matter. CDMA cannot be used in another e.g. sprint sim card will not work verizon and vice versa. GSM will not work in a CDMA and vice versa.

Too long didn't read; one mobile hotspot (and router) device that is both GSM and CDMA capable.