Xiaomi Black Shark 2 Pro review: worth buying?
Created date: 07/30/2019, 21:13:44, Updated date: 04/16/2020, 13:56:52
We've conducted a detailed review of the Xiaomi Black Shark 2 Pro, looking into its battery, how easy it is to use the camera, and whether the CPU performance is high or low. Not only that, but we've also evaluated how portable and easy to hold it is, as well as how nice the display is.
Summary of rating | Compare ratings with all 4416 smartphones |
---|
Assessment Items | Scores |
---|---|
Portability | 49/100 |
Screen size | 90/100 |
Screen clarity | 84/100 |
Battery duration | 80/100 |
Processing capability | 98/100 |
Multitasking | 99/100 |
Camera function | 89/100 |
Contents
- 1.The merits and demerits of Xiaomi Black Shark 2 Pro
- 2.Features, Performance, and Reviews for the Xiaomi Black Shark 2 Pro
- 2-1.Xiaomi Black Shark 2 Pro's size
- 2-2.The CPU performance of Xiaomi Black Shark 2 Pro
- 2-3.Xiaomi Black Shark 2 Pro's storage capacity
- 2-4.Xiaomi Black Shark 2 Pro's screen
- 2-5.The camera function of Xiaomi Black Shark 2 Pro
- 2-6.The battery performance of Xiaomi Black Shark 2 Pro
- 2-7.Overall assessment of Xiaomi Black Shark 2 Pro
- 3.Specifications of Xiaomi Black Shark 2 Pro
Features, Performance, and Reviews for the Xiaomi Black Shark 2 Pro
Xiaomi Black Shark 2 Pro's size
The Xiaomi Black Shark 2 Pro is 3.0 inches (75 mm) wide, 6.4 inches (163.6 mm) tall, and 0.3 inches (8.8 mm) thick. I can just barely use it with one hand, so it may feel big to some people. In the case of the Xiaomi Black Shark 2 Pro, it weighs about 205 oz (205 g). It feels a little heavy when held with one hand. It may tire your hand out if you operate it for too long a time.
In giving an overall rating to the Xiaomi Black Shark 2 Pro, while it may be slightly difficult to hold, it shouldn't be much of a problem when considering its general strengths and weaknesses.
Xiaomi Black Shark 2 Pro's screen
The Xiaomi Black Shark 2 Pro has a 6.39 inch screen. The smartphone has a large, impressive screen, which allows you to enjoy photos and videos to the fullest. It is also very good for writing business documents and doing other work.
The screen of the Xiaomi Black Shark 2 Pro is extremely clear, and it's able to display everything from images to videos and even video game graphics in perfect clarity.
The CPU performance of Xiaomi Black Shark 2 Pro
The Xiaomi Black Shark 2 Pro has an extremely high processing power of 2.96GHz+2.42GHz+1.78GHz×8(OctaCore), so it can smoothly run any app out there with ease. Its performance ranks among the top-class of all smartphones released to date. It's well suited to running even the most demanding of 3D games with ease.
The Xiaomi Black Shark 2 Pro has a very high RAM capacity at 12GB. There are few cases where the RAM capacity would be insufficient, so it is also well suited to multitasking. It's unlikely to feel slow even when switching between several different apps.
The Xiaomi Black Shark 2 Pro is an exceptional high-end smartphone. You will be fully content with its performance in all areas. It is a must-have for you if operation performance is important for you.
Xiaomi Black Shark 2 Pro's storage capacity
The Xiaomi Black Shark 2 Pro has 256GB of data storage, which is perfect for people who frequently take photos and videos. It is suited to taking both photos and videos, and is unlikely to feel inconvenient even with lots of apps or games installed.
The Xiaomi Black Shark 2 Pro is not compatible with SD cards, so make sure you check that there's enough storage for your needs.
The camera function of Xiaomi Black Shark 2 Pro
The Xiaomi Black Shark 2 Pro has an ultrahigh performance 48 MP main camera. This allows you to make high-quality photos and will rarely leave you wanting with regard to camera performance. This will make using your camera fun.
In addition, the front camera of the Xiaomi Black Shark 2 Pro has an extremely high resolution with 20 MP. You can take top-notch photos and the camera performance leaves no wishes unfilled. You will enjoy using your smartphone as your camera.
The battery performance of Xiaomi Black Shark 2 Pro
The Xiaomi Black Shark 2 Pro has a battery with a quite large capacity of 4000 mAh. Compared to other smartphones, the battery life of the Xiaomi Black Shark 2 Pro is very good and will no doubt satisfy all your needs. You won't have to worry about the battery even when you use the phone to watch videos or play games for hours on end.
Overall assessment of Xiaomi Black Shark 2 Pro
The Xiaomi Black Shark 2 Pro is a high-performance smartphone. You're not likely to experience any inconvenience in general use.
The merits and demerits of Xiaomi Black Shark 2 Pro
The merits of Xiaomi Black Shark 2 Pro
- With the large display you can comfortably use it to watch videos and play games.
- Photos and videos are beautiful to look at on the clear screen.
- Because of its large battery capacity, it is good for hours of watching videos and playing games.
- It has a high performance CPU, meaning that even 3D games run smoothly.
- The extremely high-spec rear camera makes the phone great for taking photogenic and scenic shots.
- Because the smartphone has a very high performance front camera, you can use it to make great shots of photospots and scenery.
The demerits of Xiaomi Black Shark 2 Pro
- no data
Comparing the specifications of Xiaomi Black Shark 2 Pro against similar products
general rating
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | general rating | |||
---|---|---|---|---|---|---|---|
![]() | 80.6 | - | Color:Shadow Black/Iceberg Grey/Gulf Blue/Streamer Purple, Dimensions (width x height x thickness):3.0 inches (75 mm) x 6.4 inches (163.6 mm) x 0.3 inches (8.8 mm), Weight:205 oz (205 g), Display type:AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi, Display size:6.39 inch, OS:Android, Chipset:Qualcomm SM8150 Snapdragon 855+, CPU specs:2.96GHz+2.42GHz+1.78GHz×8(OctaCore), RAM size:12GB, Storage size:256GB, Battery capacity:4000 mAh, Rear-camera resolution:48 MP, Front-camera resolution:20 MP | ||||
![]() | 76.4 | ≈ | Color:Carbon black/Red flame/Glacier blue/Pearl White, Dimensions (width x height x thickness):2.9 inches (74.3 mm) x 6.2 inches (156.7 mm) x 0.3 inches (8.8 mm), Weight:191 oz (191 g), Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi, Display size:6.39 inch, OS:Android, Chipset:Qualcomm SDM730 Snapdragon 730, CPU specs:2.2GHz+1.8GHz×8(OctaCore), RAM size:8GB, Storage size:256GB, Battery capacity:4000 mAh, Rear-camera resolution:48 MP, Front-camera resolution:20 MP | ||||
![]() | 78.5 | ≈ | Color:Black/Blue/White, Dimensions (width x height x thickness):2.9 inches (74.5 mm) x 6.2 inches (156.8 mm) x 0.3 inches (8.7 mm), Weight:179 oz (179 g), Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi, Display size:6.39 inch, OS:Android, Chipset:Qualcomm SDM710 Snapdragon 710, CPU specs:2.2GHz+1.7GHz×8(OctaCore), RAM size:8GB, Storage size:256GB, Battery capacity:4030 mAh, Rear-camera resolution:48 MP, Front-camera resolution:32 MP | ||||
![]() | 74.4 | Color:Kind of Gray/Not just Blue/More than White, Dimensions (width x height x thickness):2.8 inches (71.9 mm) x 6.0 inches (153.5 mm) x 0.3 inches (8.5 mm), Weight:173.8 oz (173.8 g), Display type:Super AMOLED, Screen resolution (width x height):720 x 1560, Pixel density:282 ppi, Display size:6.09 inch, OS:Android, Chipset:Qualcomm SDM665 Snapdragon 665, CPU specs:2.0GHz+1.8GHz×8(OctaCore), RAM size:6GB, Storage size:128GB, Battery capacity:4030 mAh, Rear-camera resolution:48 MP, Front-camera resolution:32 MP | |||||
![]() | 77.4 | ≈ | Color:Carbon black/Red flame/Glacier blue, Dimensions (width x height x thickness):2.9 inches (74.3 mm) x 6.2 inches (156.7 mm) x 0.3 inches (8.8 mm), Weight:191 oz (191 g), Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi, Display size:6.39 inch, OS:Android, Chipset:Qualcomm SM8150 Snapdragon 855, CPU specs:2.84GHz+2.42GHz+1.78GHz×8(OctaCore), RAM size:8GB, Storage size:256GB, Battery capacity:4000 mAh, Rear-camera resolution:48 MP, Front-camera resolution:20 MP | ||||
![]() | 77.4 | ≈ | Color:Neptune Blue/Moonlight White/Space Black/Nebula Purple/Cosmic Purple, Dimensions (width x height x thickness):3.0 inches (75.3 mm) x 6.2 inches (158.3 mm) x 0.3 inches (8.4 mm), Weight:190 oz (190 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:409 ppi, Display size:6.3 inch, OS:Android, Chipset:Qualcomm SDM665 Snapdragon 665, CPU specs:2.0GHz+1.8GHz×8(OctaCore), RAM size:6GB, Storage size:128GB, Battery capacity:4000 mAh, Rear-camera resolution:48 MP, Front-camera resolution:13 MP | ||||
![]() | 78.1 | ≈ | Color:Pearl White/Aurora Blue/Onyx Grey, Dimensions (width x height x thickness):2.9 inches (74.5 mm) x 6.2 inches (156.8 mm) x 0.3 inches (8.7 mm), Weight:179 oz (179 g), Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi, Display size:6.39 inch, OS:Android, Chipset:Qualcomm SDM710 Snapdragon 710, CPU specs:2.2GHz+1.7GHz×8(OctaCore), RAM size:6GB, Storage size:128GB, Battery capacity:4030 mAh, Rear-camera resolution:48 MP, Front-camera resolution:32 MP | ||||
![]() | 78.0 | ≈ | Color:Carbon black/Flame red/Glacier blue/Summer Honey/Pearl White, Dimensions (width x height x thickness):2.9 inches (74.3 mm) x 6.2 inches (156.7 mm) x 0.3 inches (8.8 mm), Weight:191 oz (191 g), Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi, Display size:6.39 inch, OS:Android, Chipset:Qualcomm SM8150 Snapdragon 855+, CPU specs:2.96GHz+2.42GHz+1.8GHz×8(OctaCore), RAM size:12GB, Storage size:512GB, Battery capacity:4000 mAh, Rear-camera resolution:48 MP, Front-camera resolution:20 MP |
body size
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | body size | |||
---|---|---|---|---|---|---|---|
![]() | 50.3 | - | Dimensions (width x height x thickness):3.0 inches (75 mm) x 6.4 inches (163.6 mm) x 0.3 inches (8.8 mm) | ||||
![]() | 53.0 | ≈ | Dimensions (width x height x thickness):2.9 inches (74.7 mm) x 6.2 inches (157.5 mm) x 0.3 inches (7.6 mm) | ||||
![]() | 57.6 | Dimensions (width x height x thickness):2.8 inches (70.4 mm) x 5.8 inches (146.3 mm) x 0.4 inches (9.6 mm) | |||||
![]() | 52.5 | ≈ | Dimensions (width x height x thickness):2.9 inches (74.3 mm) x 6.2 inches (156.7 mm) x 0.3 inches (8.8 mm) | ||||
![]() | 52.5 | ≈ | Dimensions (width x height x thickness):2.9 inches (74.3 mm) x 6.2 inches (156.7 mm) x 0.3 inches (8.8 mm) | ||||
![]() | 55.6 | Dimensions (width x height x thickness):2.8 inches (71.9 mm) x 6.0 inches (153.5 mm) x 0.3 inches (8.5 mm) | |||||
![]() | 52.3 | ≈ | Dimensions (width x height x thickness):2.9 inches (74.5 mm) x 6.2 inches (156.8 mm) x 0.3 inches (8.7 mm) | ||||
![]() | 55.6 | Dimensions (width x height x thickness):2.8 inches (71.9 mm) x 6.0 inches (153.5 mm) x 0.3 inches (8.5 mm) |
body weight
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | body weight | |||
---|---|---|---|---|---|---|---|
![]() | 49.3 | - | Weight:205 oz (205 g) | ||||
![]() | 61.2 | Weight:173 oz (173 g) | |||||
![]() | 64.4 | Weight:165 oz (165 g) | |||||
![]() | 54.0 | ≈ | Weight:191 oz (191 g) | ||||
![]() | 54.0 | ≈ | Weight:191 oz (191 g) | ||||
![]() | 60.9 | Weight:173.8 oz (173.8 g) | |||||
![]() | 58.8 | Weight:179 oz (179 g) | |||||
![]() | 60.9 | Weight:173.8 oz (173.8 g) |
screen size
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | screen size | |||
---|---|---|---|---|---|---|---|
![]() | 90.7 | - | Display size:6.39 inch | ||||
![]() | 90.7 | ≈ | Display size:6.39 inch | ||||
![]() | 81.2 | Display size:5.45 inch | |||||
![]() | 90.7 | ≈ | Display size:6.39 inch | ||||
![]() | 90.7 | ≈ | Display size:6.39 inch | ||||
![]() | 90.0 | ≈ | Display size:6.01 inch | ||||
![]() | 90.7 | ≈ | Display size:6.39 inch | ||||
![]() | 90.2 | ≈ | Display size:6.09 inch |
screen resolution
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | screen resolution | |||
---|---|---|---|---|---|---|---|
![]() | 75.3 | - | |||||
![]() | 75.3 | ≈ | |||||
![]() | 45.6 | ||||||
![]() | 75.3 | ≈ | |||||
![]() | 75.3 | ≈ | |||||
![]() | 48.3 | ||||||
![]() | 75.3 | ≈ | |||||
![]() | 48.3 |
RAM capacity
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | RAM capacity | |||
---|---|---|---|---|---|---|---|
![]() | 99.0 | - | RAM size:12GB | ||||
![]() | 99.0 | ≈ | RAM size:12GB | ||||
![]() | 60.0 | RAM size:3GB | |||||
![]() | 93.4 | RAM size:8GB | |||||
![]() | 93.4 | RAM size:8GB | |||||
![]() | 90.0 | RAM size:6GB | |||||
![]() | 93.4 | RAM size:8GB | |||||
![]() | 90.0 | RAM size:6GB |
storage size
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | storage size | |||
---|---|---|---|---|---|---|---|
![]() | 91.5 | - | Storage size:256GB | ||||
![]() | 91.5 | ≈ | Storage size:256GB | ||||
![]() | 55.5 | Storage size:32GB | |||||
![]() | 91.5 | ≈ | Storage size:256GB | ||||
![]() | 91.5 | ≈ | Storage size:256GB | ||||
![]() | 90.0 | ≈ | Storage size:128GB | ||||
![]() | 91.5 | ≈ | Storage size:256GB | ||||
![]() | 90.0 | ≈ | Storage size:128GB |
battery
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | battery | |||
---|---|---|---|---|---|---|---|
![]() | 80.0 | - | Battery capacity:4000 mAh | ||||
![]() | 69.5 | Battery capacity:3300 mAh | |||||
![]() | 80.0 | ≈ | Battery capacity:4000 mAh | ||||
![]() | 80.0 | ≈ | Battery capacity:4000 mAh | ||||
![]() | 80.0 | ≈ | Battery capacity:4000 mAh | ||||
![]() | 80.1 | ≈ | Battery capacity:4030 mAh | ||||
![]() | 80.1 | ≈ | Battery capacity:4030 mAh | ||||
![]() | 80.1 | ≈ | Battery capacity:4030 mAh |
rear-camera resolution
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | rear-camera resolution | |||
---|---|---|---|---|---|---|---|
![]() | 97.8 | - | Rear-camera resolution:48 MP | ||||
![]() | 97.8 | ≈ | Rear-camera resolution:48 MP | ||||
![]() | 61.7 | Rear-camera resolution:13 MP | |||||
![]() | 97.8 | ≈ | Rear-camera resolution:48 MP | ||||
![]() | 97.8 | ≈ | Rear-camera resolution:48 MP | ||||
![]() | 97.8 | ≈ | Rear-camera resolution:48 MP | ||||
![]() | 97.8 | ≈ | Rear-camera resolution:48 MP | ||||
![]() | 97.8 | ≈ | Rear-camera resolution:48 MP |
front-camera resolution
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | front-camera resolution | |||
---|---|---|---|---|---|---|---|
![]() | 81.0 | - | Front-camera resolution:20 MP | ||||
![]() | 81.0 | ≈ | Front-camera resolution:20 MP | ||||
![]() | 50.0 | Front-camera resolution:5 MP | |||||
![]() | 81.0 | ≈ | Front-camera resolution:20 MP | ||||
![]() | 81.0 | ≈ | Front-camera resolution:20 MP | ||||
![]() | 97.8 | Front-camera resolution:32 MP | |||||
![]() | 97.8 | Front-camera resolution:32 MP | |||||
![]() | 97.8 | Front-camera resolution:32 MP |
grip
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | grip | |||
---|---|---|---|---|---|---|---|
![]() | 49.8 | - | Color:Shadow Black/Iceberg Grey/Gulf Blue/Streamer Purple, Dimensions (width x height x thickness):3.0 inches (75 mm) x 6.4 inches (163.6 mm) x 0.3 inches (8.8 mm), Weight:205 oz (205 g) | ||||
![]() | 57.1 | Color:Transparent Black, Dimensions (width x height x thickness):2.9 inches (74.7 mm) x 6.2 inches (157.5 mm) x 0.3 inches (7.6 mm), Weight:173 oz (173 g) | |||||
![]() | 61.0 | Color:Matte Black/Morning blue/Matte Blue/Matte Gold/Gem Red/Gem Blue, Dimensions (width x height x thickness):2.8 inches (70.4 mm) x 5.8 inches (146.3 mm) x 0.4 inches (9.6 mm), Weight:165 oz (165 g) | |||||
![]() | 53.2 | ≈ | Color:Carbon black/Flame red/Glacier blue/Summer Honey/Pearl White, Dimensions (width x height x thickness):2.9 inches (74.3 mm) x 6.2 inches (156.7 mm) x 0.3 inches (8.8 mm), Weight:191 oz (191 g) | ||||
![]() | 53.2 | ≈ | Color:Carbon black/Red flame/Glacier blue/Pearl White, Dimensions (width x height x thickness):2.9 inches (74.3 mm) x 6.2 inches (156.7 mm) x 0.3 inches (8.8 mm), Weight:191 oz (191 g) | ||||
![]() | 58.2 | Color:Black/Blue/White, Dimensions (width x height x thickness):2.8 inches (71.9 mm) x 6.0 inches (153.5 mm) x 0.3 inches (8.5 mm), Weight:173.8 oz (173.8 g) | |||||
![]() | 55.6 | Color:Black/Blue/White, Dimensions (width x height x thickness):2.9 inches (74.5 mm) x 6.2 inches (156.8 mm) x 0.3 inches (8.7 mm), Weight:179 oz (179 g) | |||||
![]() | 58.2 | Color:Kind of Gray/Not just Blue/More than White, Dimensions (width x height x thickness):2.8 inches (71.9 mm) x 6.0 inches (153.5 mm) x 0.3 inches (8.5 mm), Weight:173.8 oz (173.8 g) |
screen cleanliness
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | screen cleanliness | |||
---|---|---|---|---|---|---|---|
![]() | 84.9 | - | Display type:AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi | ||||
![]() | 84.9 | ≈ | Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi | ||||
![]() | 60.3 | Display type:IPS LCD, Screen resolution (width x height):720 x 1440, Pixel density:295 ppi | |||||
![]() | 84.9 | ≈ | Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi | ||||
![]() | 84.9 | ≈ | Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi | ||||
![]() | 58.0 | Display type:Super AMOLED, Screen resolution (width x height):720 x 1560, Pixel density:285 ppi | |||||
![]() | 84.9 | ≈ | Display type:Super AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:403 ppi | ||||
![]() | 57.3 | Display type:Super AMOLED, Screen resolution (width x height):720 x 1560, Pixel density:282 ppi |
performance
Image | Product name | Review | Level of recommendation based on the comparison of the differences between the two | performance | |||
---|---|---|---|---|---|---|---|
![]() | 98.9 | - | OS:Android, Chipset:Qualcomm SM8150 Snapdragon 855+, CPU specs:2.96GHz+2.42GHz+1.78GHz×8(OctaCore), RAM size:12GB | ||||
![]() | 98.4 | ≈ | OS:Android, Chipset:Qualcomm SM8150 Snapdragon 855, CPU specs:2.84GHz+2.42GHz+1.78GHz×8(OctaCore), RAM size:12GB | ||||
![]() | 71.9 | OS:Android, Chipset:Qualcomm SDM439 Snapdragon 439, CPU specs:1.95GHz+1.45GHz×8(OctaCore), RAM size:3GB | |||||
![]() | 96.3 | ≈ | OS:Android, Chipset:Qualcomm SM8150 Snapdragon 855, CPU specs:2.84GHz+2.42GHz+1.78GHz×8(OctaCore), RAM size:8GB | ||||
![]() | 92.5 | OS:Android, Chipset:Qualcomm SDM730 Snapdragon 730, CPU specs:2.2GHz+1.8GHz×8(OctaCore), RAM size:8GB | |||||
![]() | 89.5 | OS:Android, Chipset:Qualcomm SDM665 Snapdragon 665, CPU specs:2.0GHz+1.8GHz×8(OctaCore), RAM size:6GB | |||||
![]() | 92.3 | OS:Android, Chipset:Qualcomm SDM710 Snapdragon 710, CPU specs:2.2GHz+1.7GHz×8(OctaCore), RAM size:8GB | |||||
![]() | 89.5 | OS:Android, Chipset:Qualcomm SDM665 Snapdragon 665, CPU specs:2.0GHz+1.8GHz×8(OctaCore), RAM size:6GB |
Specifications of Xiaomi Black Shark 2 Pro
Xiaomi Black Shark 2 Pro | ||||
Image | ![]() | |||
---|---|---|---|---|
Maker | Xiaomi | |||
Release date | 8, 2019 | |||
Color | Shadow Black/Iceberg Grey/Gulf Blue/Streamer Purple | |||
OS | Android | |||
Dimensions (width x height x thickness) | 3.0 inches (75 mm) x 6.4 inches (163.6 mm) x 0.3 inches (8.8 mm) | |||
Weight | 205 oz (205 g) | |||
Display size | 6.39 inch | |||
Display type | AMOLED | |||
Screen resolution (width x height) | 1080 x 2340 | |||
Pixel density | 403 ppi | |||
Battery capacity | 4000 mAh | |||
Chipset | Qualcomm SM8150 Snapdragon 855+ | |||
CPU specs | 2.96GHz+2.42GHz+1.78GHz×8(OctaCore) | |||
RAM size | 12GB | |||
Storage size | 256GB | |||
Rear-camera resolution | 48 MP | |||
Front-camera resolution | 20 MP | |||
Look at a smartphone Compare smartphones |