Oppo A31 vs Vivo Y21
| 手机规格 | 触控手机 | 触控手机 | 触控手机 | 触控手机 |
| 防水性和防尘性 |  | | IP52 | |
| 大小 | 131.90 x 65.54 x 8.03 mm | 130.70 x 66.40 x 9.20 mm | 161.30 x 76.40 x 8.79 mm | 164.50 x 76.00 x 9.10 mm |
| Weight | 135.00 g | | 199.80 g | 194.00 g |
| 显示屏尺寸 | 4.50" | 4.50" | 6.53" | 6.50" |
| Display | 彩色 / IPS TFT 16M 颜色 480 x 854 px (4.50") 218 ppi | 彩色 / IPS TFT 16M 颜色 480 x 854 px (4.50") 218 ppi | 彩色 / IPS TFT 16M 颜色 1080 x 2340 px (6.53") 395 ppi | 彩色 / IPS TFT 16M 颜色 60 Hz 720 x 1600 px (6.50") 270 ppi |
| 显示保护 |   | | Corning Gorilla Glass Buy screen protector | Corning Gorilla Glass Buy screen protector |
| 附加显示屏 | | | | |
| 辅助显示保护 | | | | |
| 标准电池 | Li-Ion 2000 mAhBuy powerbank | Li-Ion 1900 mAhBuy powerbank | Li-Po 4500 mAhBuy powerbank | Li-Po 5000 mAhBuy powerbank |
| 快速充电 | | | Quick Charge 4+ |  |
| 无线充电 | | | | |
| 手机存储 | 8 GB | 16 GB | 128 GB, 64 GB, 256 GB | 32 GB, 64 GB |
| 最终用户内存 | | | | 44 GB |
| 随机存取存储 (RAM) | 1 GB | 1 GB | 6 GB, 8 GB | 3 GB, 4 GB |
| Memory cards | microSD, microSDHC, microSDXC 为 128 GBBuy memory card | microSD, microSDHC, microSDXC 为 128 GBBuy memory card | microSD, microSDHC, microSDXC 为 256 GBBuy memory card | microSD, microSDHC, microSDXC 为 256 GBBuy memory card |
| Operating system | Android 4.4 KitKat | Android 5.1 Lollipop | Android 9.0 Pie | Android 11 |
| 接口 | ColorOS 2.0.1 | Funtouch 2.1 | MIUI 10 | realme UI |
| 处理器 | Qualcomm Snapdragon 410 8916 | MediaTek MT6580 | MediaTek Helio G90T | Unisoc Tiger T610 UMS512 |
| Processor clock | 1200 MHz | 1300 MHz | 2000 MHz | 1800 MHz |
| GPU | Adreno 306 | ARM Mali-400 MP2 500 MHz | ARM Mali-G76 3EEMC4 @800 MHz | ARM Mali G52 MP2 @614 MHz |
| Touchscreen | | | | |
| 双SIM卡 | | | | |
| SIM卡标准 | DualSIM(microSIM, nanoSIM) | | DualSIM(nanoSIM, nanoSIM) | DualSIM(nanoSIM, nanoSIM) |
| 卡双模式 | | nd | dual standby | dual standby |
| 混合双卡双待 | | nd | | |
| 发行日期 | 第 2 季 2015 | | 第 3 季 2019 | 第 2 季 2021 |
| 手机其他名称 | A31t | - | Xiaomi Redmi Note 8 Pro | RMX3261; RMX3263 |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS标准 | | 850 900 2100 | 850 900 1900 2100 | 850 900 2100 |
| LTE 标准 | TDD LTE: 2600, 2500, 2300, 1900 | | FDD LTE: 2600, 2100, 1900, 1800, 1700, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300, 2100, 1900 | FDD LTE: 2600, 2100, 1800, 900, 850, 800, 700 TDD LTE: 2600, 2500, 2300 |
| 5G 标准 | | | | |
| CDMA标准 | | | | |
| TD-SCDMA 标准 | 1900 2000 | | 1900 2000 | |
| UMA标准 | | | | |
相机 - 背面
| 第一台相机 | | | | |
| 相机类型 | | | 标准镜头 | 标准镜头 |
| 光电传感器模型 | | | Samsung S5KGW1 | |
| 矩阵 | 8 Mpx | 5 Mpx | 64 Mpx | 13 Mpx |
| 传感器尺寸 | | | 1/1,7 | |
| 像素大小 | | | 0,8 µm | 1,12 µm |
| Resolution | 3264x2448 px | 2592x1944 px | 9248x6936 px | |
| 光学变焦 | | | | |
| 数码变焦 | | | | 4x |
| 镜片数量 | | | | 5 |
| 视场 | | | 79 ° | |
| 焦距 | | | 26 mm | |
| 闪光灯 | LED | LED | LED | LED |
| 双色LED闪光灯 | | | | |
| 视频分辨率 | 1920x1080 px | | 3840x2160 px | 1920x1080 px |
| 视频格式 | H.263, H.264, MPEG4 | MPEG4, H.263, H.264 | H.264, H.265, MPEG4 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| 额外 | AF | - | AF, f/1.89 | AF, f/2.2 |
| 第二台相机 | | | | |
| 相机类型 | nd | nd | 广角镜头 | 微距镜头 |
| 矩阵 | nd | nd | 8 Mpx | 2 Mpx |
| 像素大小 | nd | nd | 1,12 µm | |
| 光学变焦 | nd | nd | | |
| 镜片数量 | nd | nd | | 3 |
| 视场 | nd | nd | 120 ° | |
| 焦距 | nd | nd | 13 mm | |
| 闪光灯 | nd | nd | LED | LED |
| 双色LED闪光灯 | nd | nd | | |
| 视频格式 | nd | nd | H.264, H.265, MPEG4 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| 额外 | nd | nd | FF, f/2.2 | FF, f/2.4 |
| 第三台相机 | | | | |
| 相机类型 | nd | nd | | 景深 |
| 矩阵 | nd | nd | 2 Mpx | 2 Mpx |
| 像素大小 | nd | nd | 1,75 µm | |
| 光学变焦 | nd | nd | | |
| 镜片数量 | nd | nd | | 3 |
| 闪光灯 | nd | nd | LED | |
| 双色LED闪光灯 | nd | nd | | |
| 视频格式 | nd | nd | H.264, H.265, MPEG4 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| 额外 | nd | nd | AF | FF, f/2.4 |
| 第四台相机 | | | | |
| 矩阵 | nd | nd | 2 Mpx | nd |
| 像素大小 | nd | nd | 1,75 µm | nd |
| 光学变焦 | nd | nd | | nd |
| 闪光灯 | nd | nd | LED | nd |
| 双色LED闪光灯 | nd | nd | | nd |
| 视频格式 | nd | nd | H.264, H.265, MPEG4 - 30 fps | nd |
| 额外 | nd | nd | FF | nd |
相机 - 前面
| 第一台相机 | | | | |
| 相机类型 | | | | 人像镜头 |
| 光电传感器模型 | | | Samsung S5K3T1 | |
| 矩阵 | 2 Mpx | 2 Mpx | 20 Mpx | 5 Mpx |
| Resolution | 1600x1200 px | 1600x1200 px | 5184x3880 px | |
| 光学变焦 | | | | |
| 镜片数量 | | | | 3 |
| 视场 | | | 108 ° | |
| 闪光灯 | | | | |
| 双色LED闪光灯 | | | | |
| 视频分辨率 | | | 1920x1080 px | |
| 视频格式 | H.263, H.264, MPEG4 | MPEG4, H.263, H.264 | H.264, H.265, MPEG4 - 30 fps | H.263, H.264, MPEG4 - 30 fps |
| 额外 | FF | - | FF | FF, f/2.2 |
传感器
| 加速度计 | | | | |
| 接近传感器 | | | | |
| 光传感器 | | | | |
| 磁力仪 | | | | |
| 陀螺仪 | | | | |
| 晴雨表 | | | | |
| 高度表 | | | | |
| 重力感应器 | | | | |
| 霍尔效应传感器 | | | | |
| 虹膜扫描仪 | | | | |
| 指纹采集仪 | | | | |
| 温度计 | | | | |
| 湿度计 | | | | |
数据传输
| xHTML | | | | |
| WAP | v2.0 | v2.0 | v2.0 | v2.0 |
| HSCSD | | | | |
| HSDPA | 42.00 Mbit/s | | 42.20 Mbit/s | 42.20 Mbit/s |
| HSUPA | 5.76 Mbit/s | | 5.76 Mbit/s | 5.76 Mbit/s |
| HSPA | | | | |
| HSPA+ | | | | |
| LTE DL | | | 603.00 Mbit/s | - |
| LTE UP | | | - | 51.00 Mbit/s |
| WIMAX+ | | | | |
| GPRS | 种类 12 | | | |
| EDGE | | | | |
| 蓝牙 | v4.0 | | v5.0 | v5.0 |
| A2DP規範 | | | | |
| HDMI | | | | |
| WiFi | v802.11 b/g/n | v802.11 b/g/n | v802.11 a/b/g/n/ac | v802.11 b/g/n |
| 无线频率 | 2,4 GHz | 2,4 GHz | 2,4 GHz; 5 GHz | 2,4 GHz |
| WiFi Direct | | | | |
| WiFi Display | | | | |
| DLNA | | | | |
| Miracast | | | | |
| WiFi 热点 | | | | |
| IrDA | | | | |
| USB | v2.0 | v2.0 | v2.0 Type-C | v2.0 |
| GPS | | | | |
| A-GPS | | | | |
| GLONASS | | | | |
| Beidou | | | | |
| Galileo | | | | |
| QZSS | | | | |
| NFC | | | | |
通讯与讯息
| 呼叫等待 | | | | |
| 视频会议 | | | | |
| 呼叫转移 | | | | |
| 一按通 | | | | |
| 即时通讯 | | | | |
| 短信 | | | | |
| 增强短信 | | | | |
| 多媒体短信 | | | | |
| Dictionary | XT9 | XT9 | T9 | T9 |
| Swype | | | | |
| 电子邮件用户 | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| QWERTY键盘 | | | | |
| RSS阅读器 | | | | |
多媒体
| Radio | | | | |
| MP3 | | | | |
| 立体声扬声器 | | | | |
| Audio Jack | 3.5 mm | 3.5 mm | 3.5 mm | 3.5 mm |
| HD Voice | | | | |
| 音频格式 | AAC, AAC+, APE, FLAC, MKA, OGG, WAV, eAAC+ | AAC, AAC+, AMR, APE, FLAC, OGG, WAV, WMA | AAC, AAC+, AMR, FLAC, MID, MKA, OGG, WAV, eAAC+ | AAC, AAC+, AMR, APE, FLAC, MID, MKA, OGG, WAV, WMA, eAAC+ |
| 复调音乐 | 64 意见 | | | |
| 视频钟 | | | | |
| 作曲软件 | | | | |
| 游戏 | | | | |
| Java | Dalvik | ART | ART | ART |
| 视讯电话 | | | | |
| DVB-H电视 | | | | |
| 电视机输口 | | | | |
PIM和附加功能
| 时钟 | | | | |
| 计时器 | | | | |
| 闹钟 | | | | |
| 计算器 | | | | |
| 汇率 | | | | |
| 电子记事本 | | | | |
| 日历 | | | | |
| 飞行模式 | | | | |
| SyncML | | | | |
| 数据与传真机 | | | | |
| 屏幕保护程序 | | | | |
| 主题 | | | | |
| 可交换的外壳 | | | | |
| 语音拨号 | | | | |
| 扬声器 | | | | |
| 录音电话机 | | | | |
| 振动 | | | | |
