Oh right. So is this zte MF833U1 a standard gsm one do you know with no hidden tricks like the others? 
I am just looking in the usb_modeswitch udev rules and ZTE MF833V, Telewell TW-LTE v2 is listed.
I guess the U in the above one taken from seller site may be a typo when they meant to put V? That would make sense since 1 is after meaning V1.
V1 not listed in the rules file though after just finishing search.
Oh actually I see it is discussed here already in same naming format. No resolution in that thread as to whether it worked or not. 
Or how about the Alcatel IK40V-2AALGB1 LinkKey Mobile Internet Dongle? This one benefits from being about 1/2 the price or less of other ones.