Asus ZenFone 3S Max ZC521TL vs Asus ZenFone 4 A400CXG
| Type | Touch | Touch |
| Dimensions | 149.50 x 73.70 x 8.85 mm | 124.42 x 61.44 x 12.30 mm |
| Weight | 169.50 g | 120.00 g |
| Display size | 5.20" | 4.00" |
| Display | Color / IPS TFT 16M colors 720 x 1280 px (5.20") 282 ppi | Color / TFT 16M colors 480 x 800 px (4.00") 233 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) |  | 2G: 770 min. (12.8 h) |
| Stand-by (max.) | | 2G: 295 h. (12.3 days) |
| Standard battery | Li-Po 5000 mAhBuy powerbank
| Li-Ion 1600 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 32 GB, 64 GB | 8 GB |
| RAM memory | 3 GB | 1 GB |
| Memory cards |  microSD, microSDHC, microSDXC up to 2000 GBBuy memory card | microSD, microSDHC, microSDXC up to 64 GBBuy memory card |
| Operating system | Android 7.0 Nougat | Android 4.3 Jelly Bean |
| Interface | Zen UI 3.0 | Zen UI |
| Processor | MediaTek MT6750 | Intel Atom Z2520 |
| Processor clock | 1500 MHz | 1200 MHz |
| GPU | ARM Mali-T860 MP2 @520 MHz | PowerVR SGX544 MP2 @300 MHz |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | DualSIM(microSIM, nanoSIM) | DualSIM(microSIM, microSIM) |
| DualSIM mode | dual standby | |
| Hybrid DualSIM | microSIM, microSD | |
| Announced | 1Q 2017 | 1Q 2015 |
| Other names | - | - |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 850 900 1900 2100 | 850 900 1900 2100 |
| LTE standard | FDD LTE: 2600, 2100, 1800, 850 TDD LTE: 2600, 2500, 2300, 1900 | |
| CDMA | | |
| Standard TD-SCDMA | 1900 2000 | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo matrix | 13 Mpx | 5 Mpx |
| Resolution | | 2592x1944 px |
| Optical zoom | | |
| Flash | 2x LED | |
| Dual-colour LED flash | 1+1 | |
| Video resolution | 1920x1080 px | 1920x1080 px |
| Video formats | MPEG4, H.263, H.264 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| Additional | AF, Laser AF, f/2.0 | AF |
CAMERAS - FRONT
| First camera | | |
| Photo matrix | 8 Mpx | 0.3 Mpx |
| Resolution | 3264x2448 px | 640x480 px |
| Optical zoom | | |
| Flash | | |
| Dual-colour LED flash | | |
| Video formats | MPEG4, H.263, H.264 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| Additional | FF, f/2.2 | FF |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSDPA | 42.00 Mbit/s | 42.00 Mbit/s |
| HSUPA | 5.76 Mbit/s | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | - | |
| LTE UP | 51.00 Mbit/s | |
| WIMAX+ | | |
| GPRS | | |
| EDGE | | |
| Bluetooth | v4.0 | v4.0 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 b/g/n | v802.11 b/g/n |
| WiFi frequencies | 2,4 GHz | 2,4 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 | v2.0 |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | XT9 | XT9 |
| Swype | | |
| e-mail client | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Sound formats | AAC, AAC+, AMR, WAV, eAAC+ | 3GP, AAC, AAC+, WAV |
| Polyphony | | 64 voices |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | ART | Dalvik |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |