Galaxy Quantum 4 review: The Galaxy A with a quantum-cryptography security chip.
A phone with a quantum chip.
Galaxy Quantum 4 — a Korea-exclusive Galaxy A variant for SK Telecom — embeds a QRNG quantum random-number generator chip for genuinely unpredictable cryptographic keys. A niche security flex on otherwise solid A-series mid-range hardware.
01Display
82/10082/100 puts it above the 79-point average for mid-range phones of 2023.
02Camera
72/10072/100 puts it above the 69-point average for mid-range phones of 2023.
03Performance
70/10070/100 puts it above the 68-point average for mid-range phones of 2023.
04Battery
80/10080/100 — right at the average for mid-range phones of 2023.
05Build
74/10074/100 — right at the average for mid-range phones of 2023.
- Hardware quantum random-number generator for security
- 120Hz AMOLED + OIS + IP67
- Stereo + microSD + 3.5 mm jack
- Exynos 1380 mid-tier
- Korea-exclusive (SK Telecom)
- Heavy 213 g
How this review is built: every section score, spec row and comparison on this page comes from SpecEagle's tracked catalogue — scores weight measured specs against the 148-phone cohort of mid-range devices released around the same time. We don't publish invented lab anecdotes. Spot an error? .