Try enabling DRX.
I am not sure how to edit this.
During my drive test experince, if Car AC is good then UE temp hardly goes beyond 40.
And without AC hardly crosses 46.
My issue is with UE in a backpack for a walk test.
So no AC, and no proper ventilation.
We had tests with bat temp at 50.7 degrees.
But were LTE only since NR was cut long time before.
Thermal Fail Qualcomm cause for RLF.
So even at 40 Thermal RLF occurs.
Luckily S21+5G is with Exynos.
Not with Qualcomm.
So we survive till 42-43 degrees.
And an update: code is working on Android 10 and 11. But on Android 12 it doesn’t work.
Do you have an exact value of bat. temp when NR is cut and when NR is added back due to temp?
I see in logs that as soon as bat temp is above 42 the NR is released and when bat temp drops below 41 is added back.
But do you know exact values from code line?
When temp crosses 43 degree, UE send A2 event (-140 dBm default) and NR leg is released by gNB.
For addition I have observed that when UE goes to idle mode and connected again, B2 event is configured to UE again.
There was no way gNB can know UE temperature till I tested.
There are no such settings right? Are you assuming?
Which setting? A2 (-140 dBm) is hard coded value in samsing S21 when I tested.
No, I don’t have any logs.
Network directs UE for A2 as per my understanding.
UE should not consider these values.
This is not typical A2 event which NW generally configure.
This is just the way of UE implementation to notify NW that something is wrong from UE side and release the secondary node.
Some UE vendor use SCG failure indication to convey the same to NW.
Actually what I have gone through is no threshold or way forward recommendation from OEM till now like you mentioned -140 as A2.
Hm ENDC Take back.
gNB OEM also enjoying this leverage to exclude SCG failure as normal and not considered as abnormal.
It’s just while sending A2 event, UE send this value -140 dBm.
Irrespective of whatever is current RSRP.
It depend on what cause of SCG failure UE sending.
If general one then eNB/gNB cannot differentiate normal or abnormal.
But if UE use A2 event (Like Samsung S21 do), its pretty normal for eNB and no Performance affected by it.
It’s about users experience, OEMs can hide incapability.
Plenty of handsets have the same behaviour after 20-25 min 5G uses switching to 4G.
A2 Event will remove SCG as normal cause.
But its not fault of RAN vendor.
But is there any study why NSA UE get heated so fast?
Is it due to higher BW of NR?
is it due to simultaneous uplink from NR and LTE and UE end up using more power?
Or both?
Any other reason?
And in SA also same issue faces by anyone?
It is due to long tests!
We have intensive drive test where UEs are challenged in hot summer and they get heated due to high download and upload, and YouTube and so on.
It is normal to get heated.
It is not normal that they release SCG 
I am talking about in personal use.
In personal use too.
You doo 4-5 ookla tests.
And that’s it : 5G is released.