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- Asus Zenfone 3s Max ZC521TL vs Asus Zenfone 4 Max ZC520KL
Asus Zenfone 3s Max ZC521TL vs Asus Zenfone 4 Max ZC520KL
Side-by-side specs and price comparison for buyers in Algeria.

Asus Zenfone 3s Max ZC521TL
Price coming soon

Asus Zenfone 4 Max ZC520KL
Price coming soon
Quick Verdict
Who wins each category, side by side.
Better price
Even
Faster chip
Even
Bigger battery
Asus Zenfone 3s Max ZC521TL
Faster charging
Even
Higher-resolution camera
Even
Better display
Even
Lighter body
Asus Zenfone 4 Max ZC520KL
Best value for money
Even
Full specs comparison
Display
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| Size (inches) | 5.2 | 5.2 |
| Panel Type | IPS LCD | IPS LCD |
| Resolution Height | 1280 | 1280 |
| Resolution Width | 720 | 720 |
| PPI | 282 | 282 |
| Screen-to-body | 67.7 | 67.6 |
Platform
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| CPU | Octa-core (4x1.5 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53) | Quad-core 1.4 GHz Cortex-A53 |
| GPU | Mali-T860MP2 | Adreno 308 |
| Chipset Name | Mediatek MT6750 | Qualcomm MSM8917 Snapdragon 425 |
| Process (nm) | 28 | 28 |
| OS Name | Android | Android |
| OS Version | 7 | 7 |
Memory
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| Card Slot | microSDXC (uses shared SIM slot) | microSDXC (dedicated slot) |
| Variants | 32GB 3GB RAM | 16GB 2GB RAM, 32GB 3GB RAM |
Main Camera
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| Video | 1080p@30fps | 1080p@30fps |
| Features | Dual-LED dual-tone flash, panorama, HDR | LED flash, HDR, panorama |
| Count | 1 | 2 |
| Depth | — | 5 MP, f/2.4, (depth) |
| Lens | 13 MP, f/2 | 13 MP |
Selfie Camera
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| Video | 1080p@30fps | 1080p@30fps |
| Features | — | LED flash |
| Count | 1 | 1 |
| Lens | 8 MP | 8 MP |
Battery
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| Capacity (mAh) | 5000 | 4100 |
| Chemistry | Li-Po | Li-Po |
| stand by | Up to 816 h (3G) | — |
| talk time | Up to 28 h (3G) | — |
Body
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| SIM | Nano-SIM + Micro-SIM | Nano-SIM + Micro-SIM |
| Height (mm) | 149.5 | 150.5 |
| Thickness (mm) | 8.9 | 8.8 |
| Weight (g) | 175 | 156 |
| Width (mm) | 73.7 | 73.3 |
Launch
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| Announced | 2017, January. Released 2017, February | 2017, August. Released 2017, October |
| Status | Discontinued | Discontinued |
Network
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| 2G Bands | GSM 850, 900, 1800, 1900 - SIM 1 & SIM 2 | GSM 850, 900, 1800, 1900 - SIM 1 & SIM 2 |
| 3G Bands | HSDPA 850, 900, 1900, 2100 - Global | HSDPA 850, 900, 2100 |
| 4G Bands | 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 38, 41 - Taiwan | 1, 3, 5, 7, 8, 20, 40 |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps |
| Technology | GSM, HSPA, LTE | GSM, HSPA, LTE |
Connectivity
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| Bluetooth | 4 | 4.1 |
| NFC | No | No |
| Positioning | GPS, GLONASS, BDS | GPS, GLONASS |
| Radio | FM radio | FM radio |
| USB Version | 2.0 | 2.0 |
| Wi-Fi | Wi-Fi 5 | Wi-Fi 4 |
Sound
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| 3.5mm Jack | Yes | Yes |
| Loudspeaker | Yes | Yes |
Features
| Spec | Asus Zenfone 3s Max ZC521TL | Asus Zenfone 4 Max ZC520KL |
|---|---|---|
| Sensors | Fingerprint (front-mounted), accelerometer, gyro, proximity, compass | Fingerprint (front-mounted), accelerometer, gyro, proximity, compass |
Buying advice for Algeria
Both Asus Zenfone 3s Max ZC521TL and Asus Zenfone 4 Max ZC520KL are sold in Algeria, but they fit different priorities.
Asus Zenfone 3s Max ZC521TL packs a 5000 mAh battery, which translates to longer screen-on time when you are away from a charger.
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