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5G <==> LTE flip-flop

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xela19115

Senior Member
Dec 9, 2010
126
47
Philadelphia
Samsung Galaxy S20
Phone: S20 5G Snapdragon (SM-G981U1)
Software: US OneUI 3.0 Beta 2 (Build RP1A.200720.012.G981U1EU1ZTJG).
Carrier: Mint Mobile (T-Mobile US MVNO).


Here is what I noticed.


When I am driving, I use Android Auto and when I used Beta 1, for the most part I saw a 5G icon (where 5G is available) on the phone and on the display on the AA.


Now, after Beta 2 update, when the phone's screen is on, then the 5G icon is on the AA display as well as the phone. Once the display screen times out and goes dark (while the phone is still working) the AA display goes from 5G to LTE. As soon as I wake up the phone, back to the 5G.


This behavior is new and I did not see it in Beta 1. Can someone confirm this on T-Mobile US? Thanks in advance.
 
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rayporsche

Senior Member
Jul 17, 2010
203
29
Where the Crocodiles dwell
Same story here, same device with TMO. Beta 1 was 'golden' for me but the Beta 2 is something else. I failed to understand as to how the constant LTE to 5G signal switching could help in the battery saving department, also the native email app doesn't sync properly. Aside from that is it pretty fast and much cleaner than Android 10. Totally understand that it is a Beta which could bring potential issues and such then again common sense dictates that progress should be defined as going forward not backwards.
 
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*Detection*

Senior Member
Dec 5, 2011
10,513
2,855
Durham
Same story here, same carrier, same device. Beta 1 was 'golden' for me but the Beta 2 is something else. I failed to understand as to how the constant LTE to 5G signal switching could help in the battery saving department, also the native email app doesn't sync properly. Aside from that is it pretty fast and much cleaner than Android 10. Totally understand that it is a Beta which could bring potential issues and such then again common sense dictates that progress should be defined as going forward not backwards.


Apparently the new iPhone 12 does the same, LTE must use less power than 5G, worse with the iPhone apparently it sticks to LTE the majority of the time, only switching to 5G for specific reasons
 

rayporsche

Senior Member
Jul 17, 2010
203
29
Where the Crocodiles dwell
If you dial *#2263# the device will show the 'ServiceMode' screen where you can scroll down and select the [6]NR5g Band Preference (*), press it and it will open another screen where you could choose the [2] NR NSA ONLY or [3] NR SA ONLY among others then select [A] GO MAIN which will open another screen where you can select [9]-Apply band configuration which will give you the confirmation message; APPLY DONE, reboot next.
In essence [2] NR NSA ONLY would be 'non standalone 5G' and [3] NR SA ONLY would be a 'standalone 5G'. I've tried all that with the Beta 2 yet it doesn't seem to work as it should, at this point leaving the Beta altogether is beginning to make more sense.