Yes, Nokia 7 Plus does have the dual VoLTE support.
No. Nokia 7 Plus does not have a dedicated memory card slot. It has a hybrid sim slot. So, you can use a MicroSD card and a sim card at one go.
No. Nokia 7 Plus can support only 2G, 3G & 4G network. It does not support 5G network.
Nokia 7 Plus has a weight of 183 grams.
Great battery life, immersive display, solid design, and software at its purest, that's the Nokia 7 Plus for you.