Hello! I need to know does the RB751U-2HnD support 3g USB modem ? I cannot find anything about 3g in documentation.

Yes, it does. Here is 3G configuration guide: http://wiki.mikrotik.com/wiki/Option_Gl ... _USB_Modem

Thank you !!!

Do I need a USB power injector to use the 3G modem with the 751U-2HnD?
I'm asking because I remember I needed a power injector to use a 3G modem with RB411.

No, the power injector was needed for some of our first USB products, but recently, and that includes RB751, you don't need it.

hello,
I am having some issues regarding connecting with this modem, haier HSDPA data card. It will be seen in the /system resources, but could not be seen in the interface(ppp-out).

Is mikrotik not supporting this modem so that I can know what to do.

Thanks