How to Easily Master Format ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL with Safety Hard Reset?

Tips and tricks to fix ASUS ZENFONE 4 or ZENFONE 4 PRO problems with simple tricks. This phone comes with 5.5 inches LCD screen width using dual simcard slot which can standby together and able to run 4G LTE. The screen resolutions is 1080p. The first time release in the market use Android Nougat version 7.1.1 together with Asus user interface which is call by Asus ZenUI 4.0. The good features from ASUS ZENFONE 4 (PRO) are reasonable price with fun dual camera, but Pro version have better camera specifications. Find more information about how to solve problems of ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL at community.

What is the different between ASUS ZENFONE 4 ZE554KL vs ASUS ZENFONE 4 PRO ZS551KL

With pro and without pro have some differences at :

  • Processor type at ASUS ZENFONE 4 ZE554KL use Octa core 2.2 Ghz and 1.8 Ghz while ASUS ZENFONE 4 PRO ZS551KL use octa core 2.4 Ghz and 1.9 Ghz.
  • The battery capacity at ASUS ZENFONE 4 ZE554KL use 3300 mAh while ASUS ZENFONE 4 PRO ZS551KL use 3600 mAh.
  • Main Camera at ASUS ZENFONE 4 ZE554KL use Dual camera 12 megapixel (tele) + 8 megapixel (wide) while ASUS ZENFONE 4 PRO ZS551KL use Dual camera 12 megapixel (tele) + 16 megapixel (wide). At Pro version also have 2x optical zoom.

What is Advantage of ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL Specifications:

GSM 3G HSDPA with 4G LTE, dual sim GSM+GSM
LCD 5.5 inches
Internal memory 64 GB with 4 GB RAM or 6 GB RAM for ASUS ZENFONE 4 ZE554KL
Internal memory 64 GB or 128 GB with 6 GB RAM for ASUS ZENFONE 4 PRO ZS551KL
External memory microSD maximum 256 GB
Main Camera 16 MP, autofocus, dual-LED (dual tone) flash
Front Camera Dual 12 MP + 8 MP, LED flash for ASUS ZENFONE 4 ZE554KL
Front Camera Dual 12 MP + 16 MP, LED flash for ASUS ZENFONE 4 PRO ZS551KL
Processor Octa-core processor
Operating system Android Nougat version 7.1.1
Battery Non-removable Li-Po 3300 mAh for ASUS ZENFONE 4 ZE554KL
Battery Non-removable Li-Po 3600 mAh for ASUS ZENFONE 4 PRO ZS551KL

How to Fix or Problem Solving for Recovery ZENFONE 4 (PRO) ZE554KL / ZS551KL hang or not responding or malfunctions or stuck or freezing or bricked ?

The minimal internal memory that we can buy for this phone is 64 GB storage. If we choose PRO version, then we can find ASUS ZENFONE 4 PRO ZS551KL with 128 GB internal memory options. If we need more storage, then we can use simcard slot 2 for replace with external memory MicroSD maximum 256 GB capacity. However, almost all downloaded applications will use internal memory for keep the data. Although we are not get full 64 GB free capacity, but we still have big free space to install interesting applications from Google Play Store like Facebook, WeChat, Whatsapp, Telegram, Instagram, Snapchat, Line Messenger, Viber, Skype, Blackberry Messenger (BBM). But please give our time to read as many user review as possible if we need to download new applications, because sometime they might contain viruses or malware. If we install that apps, then our ASUS ZENFONE 4 (PRO) can not work normally like hang or bricks or hang or bootloop or frozen or LCD touch screen not responsive or LCD screen not responding with our finger touch. What we have to do? First we have to try do soft reset or reboot or restart to remove temporary files or caches that can make some trouble at this phone. If our ASUS ZENFONE 4 (PRO) can boot again, then please directly download one good antivirus applications from Google Play Store like AVAST or NORTON, please choose only one we like. The antivirus will try to scan all installed applications and give recommendation setting to our phone. If the problems still happen, then next steps is doing hard reset or master format. Please note, doing hard reset will remove or erase all important data, therefore we have to backup all data first before doing master format. Doing hard reset will remove all Google account from ASUS ZENFONE 4 (PRO). For safety reasons, please do not install any unknown APK files, because it is very easy to make our phone getting trouble.

How to Force Shutdown or Force Soft Reset or Reboot or Restart ZENFONE 4 (PRO) ZE554KL / ZS551KL ?

Have good smartphone with fast access and big internal memory like ASUS ZENFONE 4 (PRO) will make this phone have many installed applications, but sometime they may crash and make some trouble at this phone like hang in the middle of running applications or stuck when playing games or LCD touch screen not responsive with our finger touch. Please press and hold POWER button until ASUS ZENFONE 4 (PRO) shutdown or turn off by itself. After this phone totally off, then we can press again POWER button to turn it ON. This process will not remove any important data, therefore we can do this process anytime we want. If our ASUS ZENFONE 4 (PRO) still can work properly, but we want to clear temporary files and caches from some applications, then please press and hold POWER button until pop-up menu appear, continue choose Shutdown / Power off / Reboot menu.

How to backup data or Contact at ZENFONE 4 (PRO) ZE554KL / ZS551KL ?

We can use microSD external card to copy or move important files using File Manager applications. If our ASUS ZENFONE 4 (PRO) has already signed in with Google account, by default our contact will be synchronize in the background to Google server. Please make sure we check all contact at Google contact server using Internet browse to make sure backup is done.

#Option 1, Hard Reset ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL with Software Menu :

  1. Make sure the battery is charge properly
  2. Turn on ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL smartphone
  3. Don’t forget to backup all important data
  4. Go to menu:Setting > Backup & reset > Factory Data Reset> Reset Phone
  5. ChooseErase everythingto continue and confirm you ready to do the format ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL
  6. The ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL will continue the step until ready to use in clean factory default.

hard reset asus zenfone 4 pro ze554kl zs551kl

#Option 2, Hard Reset ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL with Hardware Key Button:

  1. Make sure the battery fully charge
  2. Do not forget to backup all important data
  3. Turn off the ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL
  4. Press and holdVolume Up button(do not release and continue to no.5)
  5. Press and holdPower button(no.4 still continue press and hold), so now we holdVolume Up Button + Power Buttontogether
  6. Wait until vibrate appear at ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL, then releasePower button(do not releaseVolume Upbutton)
  7. If we see Logo appear at LCD screen, then releaseVolume Up button(release all button now)
  8. Wait until FASTBOOT MODE appear
  9. At this text menu, useVolume Down Buttonto chooseRecovery Modeand continue with pressPower Buttonto confirm or OK
  10. Wait until the LCD of ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL will show the Android Logo with error text, continue press and holdPOWER button, after that continue press and release one timeVolume Up,then we will seeAndroid System Recovery Mode menu
  11. Follow the menu at LCD screen to continuewipe data/factory Resetfor hard reset ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL, useVolume UporVolume Downto navigate the Menu and pressPower Buttonto OK or Enter

How to Unlock or Fix or Bypass or Solutions for ZENFONE 4 (PRO) ZE554KL / ZS551KL forgot password code or security lock screen pattern or pin (lost password)?

Dual camera are strong point for buy this phone beside big internal memory. ASUS ZENFONE 4 have 12 mp for tele + 8 mp for wide angle and ASUS ZENFONE 4 PRO have 12 mp for tele + 16 mp for wide angle. Of course we will have many private photos videos and important files which are confidential for not authorized people. Therefore we have to give security protections. Fingerprint is first option to protect, but we need to activate first from menu Setting and register our fingerprint hand to make this phone can recognize our fingers. Some users maybe do not like to use fingerprint, then we can use screen lock pattern or password pin protection. The problems will start happen when we can not unlock this phone or forgot security answer or scan not open with fingerprint. What should we do?

Do not worry about this trouble, because Android already give solutions when we forgot security screen lock pattern or password pin protections using Google account to unlock it. Please turn on this phone, when it ask for security answer, then please try to give several time wrong answer continuously until ASUS ZENFONE 4 (PRO) locked or freezing about 30 seconds. At this situations we can find Forgot Password / Pattern button. Press this button, to give our Gmail username and password account that we have already signed-in before. If we still can not access Gmail account, then we have to do hard reset using hardware button combination key above.

Is That Any Secret Code for Doing Format ZENFONE 4 (PRO) ZE554KL / ZS551KL?

There is no secret hidden code for ASUS ZENFONE 4 (PRO) to make it back to factory default. Do the options above to hard reset it.

How to Format or Erase Phone Memory at ZENFONE 4 (PRO) ZE554KL / ZS551KL ?

There are two phone memory type at ASUS ZENFONE 4 (PRO), one is internal memory and the other one is external memory. If we want to format internal memory phone then we have to do hard reset or reformat the operating system of ASUS ZENFONE 4 (PRO) as well. Please use menu setting to do hard reset or reformat using #option 1 above, but make sure to give checkbox mark at Erase Internal SD card / Internal storage. Then it will reformat the factory default operating system and remove or erase any data inside internal memory.

To reformat or wipe or erase all data at external memory, we can use menu Setting > Storage > Erase Internal Storage / SD Card. Please always make sure all data has already backup before reformat or wipe everything, because it is hard to recover formatted / wiped data at internal or external storage.

How to Make Battery of ASUS ZENFONE 4 (PRO) ZE554KL / ZS551KL Stronger, Life Longer and Not Fast to Drain ?

The battery of ASUS ZENFONE 4 (PRO) use 3300 mAh for without Pro and 3600 mAh for Pro version. Usually some users have enough time to use their phone battery for one day without need to recharge, but some users maybe need to use bigger battery for their ASUS ZENFONE 4 (PRO). Sadly ASUS ZENFONE 4 (PRO) battery is not removable, therefore we can not change or replace with bigger battery easily. For anyone who use this phone too much for play games or watch some movie or doing social media activity, then we have to do some adjustment to reduce battery usage like make LCD screen brightness as low as possible. Because more bright the LCD light, then it will use more battery power. The second step that we need to do is disable all not use connections like GPS or Wifi or Bluetooth or NFC, because they still use battery even-though at standby more. If we need to know our locations for some applications like camera applications, then we can activate GPS battery saving mode from menu Setting > Location.

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