Even with NR only, 5G drops when device heats up slightly (~38°C). Please increase the modem's 5G thermal threshold in One UI 7 update or enable Smart 5G toggle.
As per your query, we want to inform you that 5G network service may not be available depending on the network conditions of your mobile network service provider even though you are in the 5G service area.
Regarding this, the mobile network service provider will continuously improve the network quality of 5G service through gradual network coverage expansion going forward. And, the 5G devices use in conjunction with LTE and 5G networks and support the high-speed processing of large data, which may result in increased battery consumption and higher heat generation compared to LTE devices under the same conditions.
Also, when you use applications that require more power for extended periods, the device may heat up due to increased battery consumption as well. If the 5G device heats up to a specific temperature during use, the algorithm to prevent the device’s overheating operates, and accordingly, the maximum performance of the device may be limited and the network signal changes to a 4G network.
This is a normal operating condition to assure continuous device performance.
In this case, please wait for the device to get cool down for a while and then use the device again. If the 5G device gets cooled down to a specific temperature, the device will connect to the 5G network again.
Thank you for your response, but I would like to clarify some important points.
I’m not using any heavy apps or multitasking — just YouTube and normal usage like browsing, yet the phone heats up quickly and switches from 5G to 4G even when I'm in a full 5G coverage zone.
The problem is not the network coverage. I’ve observed that even a minor switch between SIMs or after cooling the device for just 1–2 seconds brings back 5G immediately. This clearly shows the issue is not with the network, but with the phone’s overly aggressive thermal policy.
It seems that the Exynos 1280 modem is set to drop 5G automatically at even moderate temperatures (~38–39°C), even during normal usage. This makes the 5G experience unreliable and defeats the purpose of buying a 5G device.
Many Exynos 1280 devices (M33, A33, M13 5G, etc.) are facing the same problem, and Samsung has not yet provided any Smart 5G toggle or option to control 5G usage efficiently — something that exists on other Snapdragon-based Samsung phones.
I request you to kindly escalate this to the development team and include a fix in the upcoming One UI 7 (Android 15) update:
🔹 Relax the 5G thermal limit (raise cutoff from 38°C to 41–42°C) 🔹 Bring back the Smart 5G toggle 🔹 Optimize thermal behavior for Exynos 1280 series
I bought a 5G phone to use 5G, not to be limited by hidden restrictions. Please take real user feedback seriously and help restore trust in the brand.
"Dear Samsung, awaiting your response to the above concerns. Many users are facing the same issue and transparency regarding future updates will help build trust."
