Should I turn 5G "On" or "Auto"?

5G NR
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Hello Experts.

I’ve heard some people say, and today I saw a Twitter with the same problem:

So I’ve been having a lot of dropped calls on T-Mobile lately, well come to find out it’s because my phone was on “5G On” and I switched it to “5G Auto” and haven’t had any issues. I was so mad at T-Mobile but it was my phone the whole time.

https://twitter.com/testing_la/status/1625311196680228864

Could this setting (5G On instead of 5G Auto) affect Performance?

What’s the difference between them?

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Hey, yes it will affect the performance. The service provider(AT&T) might not have carpet coverage of 5G in your area. In order to handover to other technologies like 4G or 3G you need to put your phone in auto mode else your phone will be stuck to one technology and eventually when the coverage if that technology is weak/no you will experience a degraded user perception.

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Yes, i agree.

Here you can find a good test to prove:

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  • 5G Auto: enables Smart Data mode. When 5G speeds don’t provide a noticeably better experience, your iPhone will switch to LTE automatically, saving battery life.

  • 5G On: always uses 5G network when it’s available. This may reduce battery life.