N981USQSEHYH1 – Galaxy Note20 5G firmware
Build N981USQSEHYH1 is a security update for the Galaxy Note20 5G (SM-N981U)
on Android 13 (One UI 5). It first appeared on Samsung's servers on Aug 27, 2025 (method) and has reached
6 regions so far. It raises the bootloader bit from 13 to 14: once installed, the device no longer accepts firmware with bit 13 or lower, so a downgrade to N981USQSDHYG5 is blocked. Samsung still serves this file.
- Model
- SM-N981U
- Android
- Android 13
- Type
- Security
- Bootloader bit
- 14
- First released
- Aug 27, 2025
- Regions
- 6
Rollout timeline by region
The date each region code (CSC) first received N981USQSEHYH1, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
VZW | USA (Verizon) | Aug 27, 2025 | day 0 | N981USQSEHYH1/N981UOYNEHYH1/N981USQSEHYH1 |
ATT | USA (AT&T) | Aug 28, 2025 | +1 day | N981USQSEHYH1/N981UOYNEHYH1/N981USQSEHYH1 |
SPR | USA (Sprint) | Aug 28, 2025 | +1 day | N981USQSEHYH1/N981UOYNEHYH1/N981USQSEHYH1 |
TMB | USA (T-Mobile) | Aug 28, 2025 | +1 day | N981USQSEHYH1/N981UOYNEHYH1/N981USQSEHYH1 |
CCT | USA (Comcast) | Sep 1, 2025 | +5 days | N981USQSEHYH1/N981UOYNEHYH1/N981USQSEHYH1 |
USC | USA (US Cellular) | Sep 3, 2025 | +7 days | N981USQSEHYH1/N981UOYNEHYH1/N981USQSEHYH1 |
Download and release notes
samloader download -m SM-N981U -r VZW -v N981USQSEHYH1/N981UOYNEHYH1/N981USQSEHYH1Samsung's release notes and security patch level for this update: SM-N981U / VZW on doc.samsungmobile.com. What each part of the build number means: decode N981USQSEHYH1.