I had lost that modem (together with its SIM card) a couple of months ago, but I got new ones right now, and everything is fine again
FRITZ!Box 6842 – has a builtin LTE modem, but my experiences with it are “diverse” – with decent LTE coverage everything is fine, if the LTE coverage is in trouble, the 6842 is of now use – under the same circumstances, the 7490+E3372 combination still works fine
I need a decent mobile Internet set-up for my “office in exile desk” situation
to be clarified: try this LTE modem also with my Synology DiskStation – I mean the most recent slim 1-bay one – if that combination works, and the DiskStation successfully acts as a mobile wifi router, then this is my leanest set-up I can figure these days