HMD XR21 vs Acer Liquid S1 Duo (S510)
Side by side comparison between HMD XR21 vs Acer Liquid S1 phones, differences, pros, cons and full specifications. What's the better?
,
6.49"
IPS
IPS
1080x2400
64
MP
MP
16mp
6GB
RAM
RAM
Octa-core
4800
mAh
mAh
(Non removable)
vs
5.7"
TFT
TFT
720x1280
8
MP
MP
2mp
1GB
RAM
RAM
Quad-core
2400
mAh
mAh
(Removable)
What's the better phone? HMD XR21
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
29 Advantages 
4 Advantages | 20 Common items in both devices |
| 16 million |
| Only digital zoom |
| PDAF: phase detection autofocus / Autofocus |
| BSI sensor |
| Full HD (1920x1080) |
| Capacitive |
| Multitouch |
| +13 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Change model | ||
| Model | HMD XR21 | Liquid S1 Duo (S510) |
| Other model names | HMD XR21 TA-1592 | Acer Liquid S1 S510, Acer Liquid S1 Dual-Sim HM.HDTAA.001 |
| Country or region available |  (Global, International) |   (Global, International), Canada, USA |
| Brand | HMD | Acer |
| Release date | 5/1/2024, Announced: 5/14/2024 | 8/1/2013 |
| Depth | 10.45 millimeters (0.41 inches) | 9.6 millimeters (0.38 inches) |
| Size (width x height) | 78.58 x 168 millimeters (3.09 x 6.61 in) | 83 x 163 millimeters (3.27 x 6.42 in) |
| Weight | 231 grams (8.09 ounces) | 195 grams (6.83 ounces) |
| Build, materials | Plastic body, glass front | feature not registered |
| Protection against water and others | IP68/IP69K certified: water-resistant up to 1.5 meters for 30min, dust-resistant, plus high-pressure and steam-washable. MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | Not supported |
📲 Display | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Display type | TFT IPS LCD | TFT LCD |
| Screen size | 6.49" inches | 5.7" inches |
| Screen-to-body ratio | ~77% (screen-to-body ratio) | ~66.2% (screen-to-body ratio) |
| Display resolution | 1080x2400 pixels (20:9) | 720x1280 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 406 PPI | 258 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Gorilla Glass Victus | Not supported |
| Refresh rate | 120Hz | feature not registered |
| Display features | 450nits[typ], 550nits[peak] | feature not registered |
🤖 Operating System | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| System version | Android 13 | Android 4.2.2 Jelly Bean |
| Firmware update | Android 14 | feature not registered |
| User Interface | feature not registered | feature not registered |
⚙️ Processor | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Chipset | 64bit: Qualcomm Snapdragon 695 (SM6375) (6nm) | 32bit: MediaTek MT6589T Turbo (28nm) |
| CPU | Octa-core, 2 processors: 2x 2.2GHz Kryo 660 Gold (Dual-core) 6x 1.7GHz Kryo 660 Silver (Hexa-core) | Quad-core, 1 processor: 4x 1.5GHz ARM Cortex-A7 (Quad-core) |
| GPU graphical controller | Qualcomm Adreno 619 (840MHz) | PowerVR SXG544 MP2 357Mhz |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| RAM memory | 6GB LPDDR4X | 1GB LPDDR2 |
| Internal storage | 128GB (101GB available) UFS 2.2 | 8GB (5.59GB available) |
| External storage | Not supported | Until 32GB microSD, microSDHC (dedicated slot) |
📶 Mobile networks | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Dual-SIM Standby - Call active on one sim card (dedicated slot) |
| SIM card | 2 slots (Dual-SIM) nano-SIM (4FF) + e-SIM | 2 slots (Dual-SIM) micro-SIM (3FF) |
| Maximum Download / Upload | 2000/1024 Mbps | 42/5.76 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | UMTS 850/900/1700/1900/2100 | UMTS 900/2100 |
| Primary 4G network | LTE Cat15 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 32, 66, 71) TD-LTE (38, 39, 40, 41, 42, 43, 48) VoLTE | Not supported |
| Primary 5G network | SA/NSA (1, 2, 3, 5, 7, 8, 20, 25, 28, 38, 40, 41, 48, 66, 71, 77, 78, 79) | Not supported |
| Primary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+ |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | LTE Cat15 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 32, 66, 71) TD-LTE (38, 39, 40, 41, 42, 43, 48) VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA | GPRS, EDGE |
📷 Camera | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Back camera (main camera) | (dual camera) 64 megapixels 8MP ultrawide f/2.21/4"1.12µm | 8 megapixels |
| Main camera resolution | 10120x6328 pixels | 3264x2448 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | Dual-LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | f/2.0 (aperture) |
| Focal length | feature not registered | feature not registered |
| Sensor size | 1/2" inches | feature not registered |
| Pixel size | feature not registered | feature not registered |
| Autofocus | PDAF: phase detection autofocus | Autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | EIS: Digital stabilization |
| Zoom | Only digital zoom | Only digital zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Supported |
| HDR | HDR photo on both cameras | HDR photo only main camera |
| Camera extras | 1080p@30fps | feature not registered |
📸 Front camera | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Front camera (secondary) | 16 megapixels | 2 megapixels |
| Front camera resolution | 4608x3456 pixels | 1600x1200 pixels |
| Video recording (secondary) | Full HD (1920x1080) | HD (1280x720) |
| Front flash | Not supported | Not supported |
| Focal aperture | feature not registered | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | feature not registered | feature not registered |
🔉 Sound and multimedia | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Loudspeaker | Stereo sound with dual speakers | Supported |
| Active noise cancellation | 2 microphones | Not supported |
| Radio | FM | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.264, H.263 |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, AAC |
🔌 Connectivity | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | MicroUSB 2.0 |
| Audio output | 3.5mm jack | 3.5mm jack |
| TV output | USB Type-C (reversible) | Not supported |
| Bluetooth | 5.1 + A2DP/LE | 4.0 + A2DP |
| WiFi | 802.11 a/b/g/n/ac/ax [wifi6] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot | 802.11 b/g/n [wifi4] (2.4GHz) |
| DLNA | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, NavIC | A-GPS, GeoTagging |
| NFC | Supported | Not supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock 2D Fingerprint sensor (side-mounted) Gyroscope Proximity sensor | Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Removable) BAT-E10 |
| Battery capacity | 4800 mAh | 2400 mAh |
| Charger, watts | 33W Wired fast charging Reverse charging by cable Quick Charge 3 USB Power Delivery 2.0 | Wired charging |
| Inductive / wireless charging | Not supported | feature not registered |
| Talk time autonomy | 48 hours (2 days) | 11 hours |
| Standby | feature not registered | 450 hours (18.8 days) |
➕ Other features | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (Swype), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | • Colors: Midnight Black | • Colors: White, Black • DTS sound • Acer Float UI • WiFi hotspot |
☢️ Radiation rate | ||
| HMD XR21 | Acer Liquid S1 Duo (S510) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.44W/kg (head), 0.41W/kg (body) |