Voip high speed gateway

It depends on which Home Internet gateway you have. I had the 4G LTE gateway for several years. It worked fine with both Grandstream HT702 and Obi200 ATA VOIP adapters. I upgraded to the NOKIA 5G21 ("trashcan") and neither worked. Some people say they have used IP and other back-end equipment with it while others say they cannot. After hours with T-Mobile Home Internet techs, they suggested I try the Arkadyan KVD21 5G gateway. It works fine with my equipment. The GUI is very limited, so I cannot say whether users needing more advanced options would be able satisfy their needs. [Note: The first KVD21 I had could not retain a connection to the internet. The replacement has been up for two days and seems stable and fine.]