My zte 4g dongle is broken (continuous disconnections, bad signal, totally useless), so I need to replace it.
Can I use a generic 4g dongle or I must buy the original zte?

I replaced my dongle by a non ZTE, unfortunatly the size was too large, and after modifiying the enclosure, it doesnt connect automaticaly to internet and doesn't have built in option for that. It was a Kruger & Matz so you can already delete this brand from the list.