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HTC U Ultra vs Xiaomi Redmi A1 Plus

2G Network SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900   SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100   HSDPA 850 / 900 / 1900 / 2100  
4G Network LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 17(700), 20(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500)   LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)  
Dimensions 162.4 x 79.8 x 8 mm   164.9 x 76.75 x 9.09mm  
Sim Type Dual-SIM, Dual Standby, Nano-SIM   Dual Sim, Dual Standby (Nano-SIM)  
Weight 170 g   192 g  
Display Type Super LCD5 capacitive touchscreen, 16M colors, Multitouch   IPS LCD Capacitive Touchscreen, 16M Colors, Multitouch   400 nits (typ)  
Display Size 1440 x 2560 pixels (~513 PPI pixel density)   6.53 Inches   720 x 1600 Pixels (~269 PPI)  
Protection Corning Gorilla Glass 5 in (64 GB), Sapphire crystal glass in (128 GB)  
Memory 64/128GB built-in, 4GB RAM   32GB Built-in, 2GB RAM  
Card slot microSD Card (support up to 256GB) (uses SIM 2 slot)   microSDXC (dedicated)  
GPRS Yes Yes
EDGE Yes Yes
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, DLNA, hotspot   Wi-Fi 802.11 a/b/g/n, hotspot  
BlueTooth v4.2 with A2DP, LE   v5.0 with A2DP, LE  
USB v3.1, Type-C 1.0 reversible connector   microUSB 2.0  
NFC Yes   No  
GPS Yes + A-GPS support & Glonass   Yes + A-GPS support & Glonass, BDS  
Main Camera F/1.8, 26mm, OIS, laser & phase detection, 1/2.3'' sensor size, 1.55µm pixel size, geo-tagging, touch focus, face detection, Auto-HDR, panorama, Video ([email protected] (24-bit/192kHz audio), [email protected])   Dual Camera: 8 MP, (wide) + 0.3 MP, Dual LED Flash   Phase detection, geo-tagging, touch focus, face detection, Video (1080p@30fps)  
Front Camera 16 MP, 1080p, Auto-HDR   5 MP, HDR, Video (1080p@30fps)  
OS Android OS, v7.0 (Nougat)   Android 12 Go edition  
Chipset Qualcomm MSM8996 Snapdragon 821   Mediatek MT6761 Helio A22 (12 nm)  
Processor Quad-core (2 x 2.15 GHz Kryo + 2 x 1.6 GHz Kryo))   2.0 Ghz Quad Core Cortex-A53  
GPU Adreno 530   PowerVR GE6300  
Sensors Accelerometer, gyro, proximity, compass, Fingerprint (rear-mounted)   Accelerometer, Fingerprint (rear-mounted)  
Browser HTML5   HTML5  
Sound Speakerphone   3.5mm Audio Jack, 24-bit/192kHz audio, Speaker Phone  
Colors Brilliant Black, Cosmetic Pink, Ice White, Sapphire Blue   Light Green, Light Blue, Black  
Battery - Non-removable   (Li-ion Non removable), 5000 mAh   - Battery charging 10W  
Misc Active noise cancellation with dedicated mic, Fast battery charging (Quick Charge 3.0), Document editor, Photo video/editor, Google Search, Maps, Gmail, YouTube, Calendar, MP4/H.264 player, MP3/eAAC+/WAV/Flac player, 24-bit/192kHz audio, YouTube, Google Talk   SMS(threaded view), MMS, Email, Push Mail, IM   Photo/video editor, Document viewer