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Asus Zenfone 2 ZE551ML Question Answer FAQ – Doubts Cleared

Asus will soon launch Zenfone 2 variants in India on 23rd April and before the first batch goes on sale, we got our hands on the high end 4 GB RAM model, The Zenfone 2 ZE551ML, which will be the pricier of the lot, but not by a wide margin. Before our full blown review, here are some answers to popular Zenfone 2 questions and answers.


Asus Zenfone 2 Quick Specs

  • Display Size: 5.5 Inch with, 1920 x 1080 Full HD resolution, Gorilla Glass 3 protection
  • Processor: 64 bit Quad Core Intel Atom Z3580 processor running at 2.3GHz  with PowerVR G6430 GPU
  • RAM: 4GB
  • Software Version: Android 5.0 Lollipop based ZenUI
  • Primary Camera: 13 MP AF camera with Dual Tone LED flash, F 2.0 Wide angle lens
  • Secondary Camera: 5 MP, With f2.0 Lens
  • Internal Storage: 32 GB
  • External Storage: MicroSD support upto 64 GB
  • Battery: 3000 mAh battery Lithium Ion
  • Connectivity: 3G, 4G LTE, Wi-Fi 802.11 b/g/n, Bluetooth 4.0 with A2DP, aGPS, 3.5mm audio jack, FM Radio
  • Others: OTG Support – Yes, Dual SIM – Yes

Recommended: Asus Zenfone 2 Hands on, Photo Gallery and Video

Question – Does Asus Zenfone 2 have Corning Gorilla Glass Protection?

Answer –  Yes, Asus Zenfone 2 comes with Gorilla Glass 3 protection on top.

Question – How is the Display of Zenfone 2?

Answer –  The Zenfone 2 has a very good quality display. Full HD resolution makes it very crisp and sharp. Viewing angles are excellent too. In our initial testing colors and contrast looks accurate too. Zen UI allows you to set Color temperature in different modes (balance, reading, vivid) or you can set a customize hue and saturation according to your taste. Outdoor visibility is good.

Question – How is the Build Quality?


Answer –  Zenfone 2 has a curved back and feels a lot like LG high end smartphones, even without taking the rear key volume rocker into account. Shifting volume rocker and power key from the sides as allowed for very slim edges, which combined with brushed metal back, makes it a little slippery. Zenfone 2 looks great and the weight is also well balanced and manageable.

Question – Are the Capacitive navigation buttons backlit?

Answer – No, the capacitive buttons are not backlit.

Question – Does the odd button placement affect usage experience?

Answer – The power key has been shifted to the top, but since you can unlock and also lock, the phone by double tapping the display or home button, this is manageable. The rear volume rocker takes some getting used to, and is slightly irritating while operating in landscape mode.

Question – Is there any heating issue in Zenfone 2?

Answer – So far, we haven’t experience any inconsistent heating in Zenfone 2 in day to day usage. Zenfone 2 heats up from around the camera, and though you feel more heat, temperature remains under control. The maximum we recorded was 36 degree Celsius.

Question – What comes inside the Box?

Answer – 2 Ampere wall charger, Documentation and USB Cable. We didn’t get headphones with our review unit.

Question – What size SIM card is supported? How is the call quality?

Answer – Both SIM cards accept Micro SIM and only one SIM supports 4G/ 3G. Call quality has been very good so far. Cellular video calling is not supported.


Question – Can you record calls on Zenfone 2?

Answer – Yes, call recording is supported.

Question – Does it have LED notification light?

Answer – Yes, LED notification light is there.

Question – How much is Free Storage?

Answer –  Out of 32 GB, 25.53 GB is available at use end, you can move apps and games to SD card as well.


Question – Does it support USB OTG?

Answer – Yes, USB OTG is supported in Zenfone 2.

Question – How is the Camera Quality?

Answer – The 13 MP camera can record full HD videos and allows you to toggle with ISO, White balance and exposure. The rear camera quality seems pretty good so far, though we need to spend some more time with before we give our final verdict. The 5 MP selfie camera is again a very decent performer.

Camera Samples

P_20150410_202155P_20150414_225943P_20150414_225959 (1)

Question – How is the performance ? How much did it score on Antutu and Nenamarks?


Answer – Zenfone 2 scored 46,647 on Antutu and 59.7 fps on Nenamarks 2. Performance has been smooth so far even with high end gaming.


Question – Are all apps compatible with Intel chipset in Zenfone 2?

Answer – So far, we haven’t encountered any app which didn’t run on Zenfone 2 and we have tried a mixture of popular and fairly unknown apps. But yes, theoretically there must be few apps not compatible with the platform. All popular apps will be supported.

Question – How much RAM is free on First Boot?

Answer –  Out of 4 GB, more than 2 GB RAM is available. There won’t be any RAM shortage on the device.

QuestionHow many sensors does  Zenfone 2 have?

Answer – You can see the full list in the image below.


Question – How is GPS Locking?

Answer – GPS locking is good on Zenfone 2 for both indoors and outdoors.

Question – How loud is Loudspeaker on Zenfone 2?

Answer – The Zenfone 2 loudspeaker is loud enough for media consumption. Because of the curved rear design, sound doesn’t get muffled, even when the phone is resting on its back.

Question – Can Zenfone 2 play Full HD 1080p Videos?

Answer – Yes, the handset can play Full HD 1080p and HD 720p videos of several formats smoothly without any issues.

Question – Can Zenfone 2 be connected to Bluetooth headsets?

Answer – Yes, you can connect it to Bluetooth headset

Question – Is WiFi Display supported?

Answer – Yes, Zenfone 2 supports WiFi Display.

Question – How is the battery backup?

Answer – Battery backup seems above average so far. Antutu Battery Tester score is 8940. A battery saver mode is also present which also has a customized mode for some very basic customization. While playing HD videos for 10 minutes, Battery dropped by 3 percent. The battery supports rapid charging and from the wall charger the phone charged from 15 percent to 60 percent in 30 minutes.


10 minutes of gaming depleted battery by 4 percent and when we played an HD video Lab501 battery life test, Battery reduced by 3 percent in 15 minutes with auto brightness on. When we played a camera shot full HD video in loop for 30 minutes, battery reduced by 7 percent.

Asus Zenfone 2 4Gb RAM ZE551ML India Unboxing, Review, Expected Price and Overview [Video]


Zenfone 2 improves over last generation Zenfones in design and functionality. The new Zenfone 2 scores high in almost all departments. While it is still too early for us to give our final verdict, things look good for Asus. Meanwhile, you can ask any Zenfone 2 related question in the comment section below.


52 thoughts on “Asus Zenfone 2 ZE551ML Question Answer FAQ – Doubts Cleared”

  1. Does Zenfone 2 has Multi-WIndow Option? If not then can you suggest any 3rd Party App which will run without Root…… coz being an Engineering Student, I need a multiwindow Feature to open 2 Images at one time of Notes,etc,……………….. btw Great Review.

  2. Other phones like one plus one get heatup around 50 degree across the camera while play high defination games like contract killer. Is this phone also suffers from this same issues ?

  3. May I use 2g and 3g sim in 4g lte slot?? Also I have a question.
    Are the two sims in standby mode at a time??

  4. Is 2nd SIM only for call? It can only support 2G. Right?
    3G/4G support is on Sim one only. Right?
    If this is true then SIM types of Mi 4i looks better.

  5. Sasidhar Kareti

    Fantastic FAQs Deepak..keep doing this FAQ articles…they are so useful….

  6. that has been addressed in the article. Yes, all major apps will work. There might be a few which won’t work, but we haven’t come across any so far.

  7. i was read in flipkart review option, 3 to 4 users wrote that UC browser are not working in it because of intel processor. that why i am asking is it true?

  8. hello its android not window operating system all android its 5.01 lollipol all android app run on it

  9. i have purchased zenfone 2 (4gb,32 internal model) just when it was announced in india…and got it just 3days experience is just awsm..that phone is very good in all departments…only the camera quality is just above average…except that everything is just superb (including battery gives nearly 20 hours backup with continious wi-fi..and nearly 2 hours of high end gaming..) only question is does every branded headphones with 3.5 mm jack comes compatible with asus zenfone 2???as i have to buy a new headphone..i’m a bit concerned about that..pls can anyone help??

  10. yes only sim1 supports 4g/lte..sim2 supports 2g only..but from my point of view it is not a very big deal..cause max users always use 4g in just one slot…using 4g in both slot is also very expensive i think…except that zenfone 2 is better than Mi4i in all departments..

  11. i bought asus zenfone 2 from flipkart… but problem is that it gets too much heated during time of charging…. mainly its part of camera gets more heated…… is this a common problem or some technical problem of my mobile… and if it is a common issue with all mobiles…. so does this heating will efects its circuits … or does this has any harm to phone … plz help it out

  12. This is there with all Zenfone 2 units. It heats up while charging and feels very hot, but when i measured temperature it was still around 36, which isn’t abnormal while charging. Use the original box fast charger only

  13. I purchased Asus zenfone 2 and my phone gets too much heated even in normal conditions. After using it for one hour, its difficult to call someone and talk as its screen becomes too hot. Is it just my phone or a common problem with this phone? Camera quality is also not up to the mark. Rest is fine.

  14. Hi tej here, I brought ZenFone 2 on 22nd of this month, regularly am facing problem that due to some reason external sd card is not working but if I restart the mobile means problem will be get solved…… shall I know why this problem s occured…..

  15. mohammad ameeruddin

    my zenfone 2 is not showing any display after i answer the call can any help me what sort of issue is this

  16. This could be due to several reasons. Please talk to customer care and ask for replacement. Make sure you try another SD card to confirm that it is not faulty

  17. Hi, admin… I bought ZenFone 2 and I got a problem on battery percentage…it power off automatically after reached 50% and I didn’t get notify on battery running low….ask for help….

  18. what you can do on your own is try to recaliberate the battery. This requires you to enter recovery mode, wipe battery stats, then drain full battery and charge it to 100 percent in the same order. If you don’t feel comfortable with entering recovery mode get it checked at the service center

  19. The Joker NIACL-AO

    my zenfone 2 ZE551ML is asking to update the system software should i update it

  20. I love this fone but one think i dont like when play FM radio sound not compatible middle type

  21. Vijay Pimplodkar

    Hi ,
    I purchashed asus zenfone week back. There is problem with battery percentage.It while 20-40 it takes long time to charge and suddenly it shows 100%charged but while draining it drains normally from 100-0.What can i do to resolve this issue?

  22. Hi,

    I purchased a Zenfone 2 ZE551ML, 4 GB RAM, 64 GB storage, All my calls cut within 2 to 4 minutes.

    I have updated the system software, updated all ASUS softwares, did SIM swaping on a working 3G/4G mobile as mentioned in ASUS website and cleared up the memory cache, Still the call drop issue persist.

    The tower goes off and come up again in 2 or 3 seconds.

    Do you have a solution?


    am not able to view and download the mail attachments in asus zenfone 2. how to do this?

  24. I tried to record a video using my Zenfone. But it says “multi-display in use camera will not record video”. What should I do? Thanks!

  25. try clearing data of ASUS Camera. Path:Settings>>Apps>>ALL>>Camera>>Clear data

    let us know if it worked.

  26. I have two SIM cards both 3G india there is no range everywhere for all service providers hence we have to use two sims with 3G.we use available service and keep ourselves I can do it in case of ASus zen!

  27. I bought asus zenphn2 and on the 2nd day I got a notification to update software after updating my video camera not working properly . Wht will I do??

  28. hi
    i purchased a new asus zenfone 2 mobile. i have an issue with that mobile that is whwn i switch off my mobile it will produce a bad noice.. and it cannot be stopped..pls give me a solution for that

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