2017, August
Zenfone 4 Pro ZS551KL
Chipset
Qualcomm MSM8998 Snapdragon 835 (10 nm)
Battery
Non-removable Li-Ion 3600 mAh battery
OS
Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo); ZenUI 4
Announced Price
About 390 EUR
Full Specifications
Network
| Technology | GSM / HSPA / LTE |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Bands | HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100 |
| 4G Bands | LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 19(800), 20(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Global, Taiwan |
Build / Physical
| Weight | 175 g (6.17 oz) |
| Dimensions | 156.9 x 75.6 x 7.6 mm (6.18 x 2.98 x 0.30 in) |
| SIM | Hybrid Dual SIM (Nano-SIM, dual stand-by) |
Memory
| Card Slot | microSD, up to 512 GB (uses shared SIM slot) |
Platform
| Chipset | Qualcomm MSM8998 Snapdragon 835 (10 nm) |
| OS | Android 7.1.1 (Nougat), upgradable to Android 8 (Oreo); ZenUI 4 |
| CPU | Octa-core (4x2.45 GHz Kryo & 4x1.9 GHz Kryo) |
| GPU | Adreno 540 |
Connectivity
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot |
| Bluetooth | 5.0, A2DP, EDR, LE, aptX |
| NFC | Yes |
| Radio | FM radio |
| Positioning | Yes |
Battery
| Capacity | Non-removable Li-Ion 3600 mAh battery |
| USB Type | Type-C 1.0 reversible connector |
| Charging Speed | Fast battery charging 18W: 50% in 32 min |
Sound
| Loudspeaker | Yes, dual speakers |
| 3.5mm Jack | Yes |
Variants
| Colors | Moonlight white, Pure Black |