A simple review of Siswoo Longbow C55.

 Siswoo Longbow C55 smartphone is a product from China, and I bought it from Ali-Express, insterest of after Doogee X5 Pro.

 This phone has 5.5" large IPS LCD and 5 touching points, 1280x720p HD resolution. It is little bit low for 5.5" as detailed view as like comics or images. CPU is Mediatek 8 cores series of MT6753. 8 cores of 64bit ARM Cortex-A53 series. Built in Android is runs on 64bit native, and some apps are acquires 64bit additional package like Antutu bechmark.

  DDR3 2GB memory and 16GB NAND flash (maybe MLC eMMC) is enough to install most of light apps, and it expands for external microSDXC card. If you put on device, C55 Android OS automatically mount it to default sdcard0 and built in filesystem mounts as sdcard1. User could be set default storage to "Phone", but it actually not work. So I recommend to use good SDXC for default filesystem with FAT32. C55 doesn't support exFAT, so don't format any sdcard if its capacity over than 32GB. exFAT not be recognized, and it will be need to formatted in FAT32.


  • Large display. 5.5" size is much bigger.
  • Light weight even it has 5.5" LCD
  • Performance is really nice for using it to game device.
  • Built in BesAudio engine exapnds hearing experience. But not for Hi-Fi.
  • Good voice call quality.
  • 3300mAh replaceable battery.
  • 3G/LTE works well, WiFi also, and supports 5GHz.
  • IrDA supported: Rx/Tx works well.
  • Built in FM radio.
  • OTG.
  • Dual micro SIM slots.
  • External mico SD slot up to 128GB (not sure, my SDXC is 64GB)
  • Supporting loseless Bluetooth audio transfer.
  • Supporting App locker, App permission, App auto launcher disable.
  • Front LED light on 5MP camera.
  • Acceptable 13MP rear camera.
  • Fast GPS responsibility.
  • PRICE is KING. Just average of 123 USD on Ali-Express.
  • 2GB DDR3 (works on 3.5GB/sec) and 16GB internal flash.
  • 64bit version of Android 5.1 (not sure memory leakage fixed)


  • 1280x720 HD resolution is not enough detail for 5.5" ...
  • Not good view angle even it has IPS LCD.
  • basically DEBUG mode turn on : You must turn it off if you are first user.
  • No NFC.
  • Useless HotKnot.
  • Old school navigation icons. 
  • No navigation button light.
  • Loud speaker place back bottom side.
  • Rear camera flash is not dual, it's little bit weak than modern Android devices.
  • Battery exhaustion little fast (in my case) than Doogee X5 Pro, same like LG G3.
  • Strange launcher(home) page alignment. Default page is 2, not 1.
  • Sometimes GPS has error in 1, 2 seconds while stopped on road.

 Especially memory performance was nice. And eMMC also good in price, writing speed over 25MB/sec, and reading is over 60MB/sec. I don't this this smartphone is like as bought on 120 USD.

 I recommend this for people who don't like waste on Android phones, or need phone for office calls, and need economic phablet.
 It's a nice phablet for price, and acceptable performance for most of 3D games. 8 cores will make your multiple apps working in smoothely, especially multiple downloading with fast SDXC card.
 Conclusion is really nice phablet in 120 USD if you don't trust Chinese malware or spyware and backdoor. (It hasn't like those as my test)

A simple review of Doogee X5 Pro.

 I had experience of Doogee X5 Pro in term of a month, and writing final conclusion in here refer to my other blogs. You could be check these URLs.

(Korean) http://rageworx.tistory.com/1493
(English) http://rageworx.iptime.org/?s=Doogee+X5

 Other english blog may not always on line because it runs on my old Android device. So I recommend to read this final review instead other english blog.

 Doogee X5 Pro is not a like of high performanced Android device. It has a CPU of mediatek with ARM Cortex-A53, contains 4 cores in 64bit @ maximum 1GHz. Model labelled as MT6735P.

 GPU embedded Mali-T720 but there's nothing detailed information about how it works on fast in frequency. It is just compromise for enjoying simple 3D graphics game in maximum playable to Need For Speed - Most wanted.

 Total performance of Antutu Bench was about 20000 scored in 32bit.

 I don't believe this score definitely describes its all performance, It really feels better than my LG G3 in normal life. There's nothing like laggy in default system UI even it after ran heavy memory acquired app.

 Actually internal DDR3 memory is not so best performanced, and maybe it is just running on under 233MHz in real clock. (so it runs as like DDR3-PC1866)  It is enough to doing anything what to do except really heavy graphic game like "In Fear I Trust".

 Specially loud speak place on the bottom.

 It makes loud speaker not blocked when this phone put on flat like your desk. Output quality is not so nice like iPhone or expensive devices.

 Charging port place on top side with 3.5pi headphone. It seems not a good choice for comfort design, but I don't expect it for its economic price.


  • Bright & Sharp IPS LCD in size of 5" (1280x720p HD res.)
  • Long battery life (than similar models in capacity of 2200mAh)
  • Smooth video play in H.264 w/ 720p (1080p seems OK.)
  • Enough to enjoying music with default player, but not for Hi-Fi quality.
  • Default built in EQ, Sound exapnsion. (more loudy, more bass)
  • Built in app permission, auto run block, app lock.
  • Good radio for 3G,LTE,Wi-Fi
  • No need to worry about built-in malware or backdoor.
  • PRICE under 90 USD.


  • lack of OTG: You shouldn't connect USB stick or gamepad.
  • Only 2 multi touch points on screen.
  • Vertical reflecting on LCD touch sensor.
  • Too sensible touch: It's little to hard typing keyboard in fast speed.
  • micoSD mounts on default file system as sdcard0.
  • Some service app automatically not activates if intelligence battery function turned on.
  • Default lancher app is not useful. Recommend to change it to other.
  • Camera? It's just for cheappy film camera. Don't except on this.
 Actually it still on my hand for office phone calls. It's reallt comfort for reading email and News on my right hand as like my iPhone4 and 5. Especially IPS LCD is really nice to watch video and battery performance is really better than my LG G3 even it has a third of 3000mAh.
 It's a really nice phone if you are looking for smart phone for price under 90 USD with 2GB memory with 16GB NAND flash, and plus supports external micor SD card slot. Plus more it support most of LTE in the world except china FDD-LTE.