TechRadar also noticed that, despite the high power of its processor, some apps and interface functions suffered from performance issues, indicating that the S5's operating system may not have been completely optimized for its system-on-chip.
Resensi juga melihat bahwa, meskipun daya tinggi dari prosesor, beberapa aplikasi dan fungsi antarmuka menderita masalah kinerja, menunjukkan bahwa sistem operasi S5 mungkin belum sepenuhnya dioptimalkan untuk sistem-pada-chip.