Faster 3Gbps download speeds available with 5G Standalone service require the use of Carrier Aggregation which combines multiple channels of 5G spectrum. To imagine how Carrier Aggregation works, imagine a sleepy two-way roadway adding additional lanes going in both directions allowing more cars to be on the highway driving at faster speeds.
If your iPhone is on T-Mobile, make sure you have 5G Standalone toggled on
Apple writes underneath the toggle, “5G Standalone uses 5G for all cellular activity, including cellular network connections. This may impact battery life and reliability of voice and data connection.” If you don’t use T-Mobile for wireless service, you don’t need to turn on that toggle switch. Keep in mind that if you enable 5G Standalone, your 5G cellular performance will be improved although your battery life will take in on the chin.
