What is the difference between 5G, 5G+, and 5G UW icons on my iPhone?

All three icons indicate your carrier's 5G network is available, but 5G+ and 5G UW specifically indicate a higher frequency 5G network is available. All three are supported on iPhone 12 models and are not available in all countries or regions. For more details, Apple recommends checking the Apple Support article 'Use 5G with your iPhone.' (Pages 1-2)