Yes, Nokia 8810 4G does have the VoLTE support. You can make calls via VoLTE enabled network easily.
Yes, Nokia 8110 4G does have the vibration alert.
Nokia 8110 4G comes with 512MB RAM and 4GB internal storage. You will get practically unlimited storage for SMS.
Nokia 8110 4G comes with 512MB RAM and 4GB internal storage. Hence, just like your Android phone, it has phonebook with unlimited storage.