The first wave of networks and devices will be classed as Non-Standalone (NSA), which is to say the 5G networks will be supported by existing 4G core infrastructure. Here, 5G-enabled smartphones will connect to 5G frequencies for download and upload speed improvements but will still use 4G for non-data duties such as talking to the cell towers and servers.The 5G Standalone (SA) network solely rely on 5G infrastructure.
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