Go to Settings → Security → Enable “Install from Unknown Sources” (or allow Chrome/Files to install apps).
The Dolphin development team officially announced the removal of 32-bit support in late 2019. The decision was driven by the following factors: 32 Bit Dolphin Emulator Android
Because 32-bit builds are unsupported, they contain unpatched exploits (including the infamous "Dirty Pipe" vulnerability in older kernels). Furthermore, fake "Dolphin 32-bit Pro" APKs on random forums are riddled with malware, adware, and cryptocurrency miners. If you download a 32-bit APK from anywhere other than a verified developer mirror, scan it with VirusTotal first. Go to Settings → Security → Enable “Install
If you have a newer 64-bit build installed, your phone will complain about signature mismatches. Uninstall it first. If you have a newer 64-bit build installed,
Before diving into Dolphin specifically, let’s establish a clear technical foundation.