Why Android Version Matters
An APK can require APIs that do not exist on an older Android release. When that happens, installation may fail or the app may crash immediately.
Where to Look
Most phones show the Android version under Settings → About phone, Software information or a similarly named screen. Samsung often uses “Software information,” while Pixel and near-stock Android place it under “Android version.”
Manufacturer Menu Names Differ
Samsung commonly places version details under About phone → Software information. Pixel and near-stock Android usually show Android version directly under About phone. Xiaomi/Redmi/POCO and Huawei use their own About-device layouts. Use the version number itself, not a marketing name such as One UI or HyperOS, when comparing an APK requirement.
Security Patch Level Is Not the Android Version
A phone can have a recent security patch while still running an older major Android release. When an APK says Android 8, 10, 13 or another minimum, compare that requirement with the major Android version rather than the patch date.
Compare With the Build Requirement
Use the requirement published for the exact HappyMod version you are downloading. Do not assume the requirement for last year’s build is still correct.
Check 32-Bit and 64-Bit Compatibility Separately
Android version is only one compatibility factor. Some APKs or game libraries target particular CPU architectures. If the Android requirement is met but installation or launch still fails, architecture can be another reason to compare the exact build rather than changing unrelated settings.
Do Not Confuse One UI, HyperOS or EMUI With Android Version
Manufacturer interface names sit on top of Android and have their own version numbers. When an APK says Android 8, 10 or 13, compare it with the underlying Android release shown in device information, not the One UI, HyperOS or EMUI number.
Record the Result Before Troubleshooting
Write down the Android version, security patch level and phone model before changing settings. Those three details make installation problems much easier to compare with a known requirement and prevent a menu-label difference from being mistaken for a compatibility failure.