DIR-855 with latest firmware (1.23WW)

Tries to use a HUAWEI E1750 3G modem as internet connection but the router will not use the modem.

E1750 has firmware 11.126.07.04.000 and the PIN-code is de-activated.
Is there is a list which 3G/4G modems are usable or is there activitiy for making new modems to work with the DIR-855 ?
E1750 modem works perfectly in my linux-laptop right beside the router.