Tips and solutions for fix problems at ACER LIQUID Z520. This phone have single simcard GSM and dual simcard GSM-GSM which can on together. To make this phone can use for entertainment or work or games, ACER LIQUID Z520 already have 5 inches LCD screen but still not HD resolutions. We get Quad core with 1.3 Ghz clock speed. There are 2 options for internal memory, one is 8 GB internal memory with 1 GB RAM and the other one is 16 internal memory with 2 GB RAM with different selling price.


What is Advantage of ACER LIQUID Z520 (DUO) Specifications:

GSM 3G GSM LCD 5  inches screen
Internal memory 8 GB ROM with 1 GB RAM
Internal memory 16 GB ROM with 1 GB RAM
External memory microSD, up to 32 GB
Main Camera 8 MP, 3264 x 2448 pixels, autofocus, LED flash
Front Camera 2 MP
Processor Quad-core 1.3 GHz
Operating Android OS, v4.4.2 (KitKat) can be upgrade to Android Lollipop
Battery Li-Po 2000 mAh



How to Fix or Problem Solving for Recovery ACER LIQUID Z520 (DUO)  hang or not responding or malfunctions or stuck or freezing or bricked ?

It is safe to install several important applications at ACER LIQUID Z520 that we get from Google Play Store like Facebook, Instagram, Whatsapp, WeChat, Line Messenger, Blackberry Messenger (BBM), Viber, Skype and several other more, but some other applications from Google Play Store can make trouble because it may contain viruses or malware or not compatible with this phone. It can make our ACER LIQUID Z520 become hang or stuck or bricks or frozen or boot logo loop or LCD touch screen not responsive. Please force soft reset or force reboot or force shutdown to remove temporary files or caches. If our phone get infected with viruses then we have to install antivirus applications and scan all installed apps at our ACER LIQUID Z520. If this problems still happen, then we have to do hard reset or master format. Please always backup all important data at ACER LIQUID Z520 before doing hard reset, because all important data will be wipe or removed.


How to Force Shutdown or Force Soft Reset or Force Reboot or Force Restart ACER LIQUID Z520 (DUO) ?

What should we do when our ACER LIQUID Z520 become trouble or hang or LCD touch screen not responsive with our finger touch? We have to force shutdown or force reboot or force soft reset to restart all running applications from beginning. Please remove back cover case of ACER LIQUID Z520, then remove or unplug the battery, wait about 5 seconds, then put again battery at right positions, continue press POWER button to turn it ON again. This process will not remove any important data, so we can do this process anytime we want because it safe. If our ACER LIQUID Z520 still normally but we want to clean temporary files and caches, then press and hold POWER button until pop-up menu appear, then choose Shutdown / Power off / Reboot menu.


#Option 1, Hard Reset ACER LIQUID Z520 (DUO) with Software Menu :

  1. Turn on ACER LIQUID Z520 (DUO)
  2. Make sure the battery already charge properly
  3. You better to backup all important data
  4. Go to menu: Setting > Backup & reset > Factory data reset > Reset phone
  5. Choose Erase everything to continue and confirm you ready to do the format ACER LIQUID Z520 (DUO)
  6. The ACER LIQUID Z520 (DUO) will continue the step until ready to use in clean factory default.



hard reset acer liquid z520

#Option 2, Hard Reset ACER LIQUID Z520 (DUO) with Hardware Key Button:

  1. Please check that the battery is not empty
  2. Do not forget to backup all important data
  3. Turn off the ACER LIQUID Z520 (DUO)
  4. Press and Hold Power Button + Volume Up together until the smartphone show menu at LCD
  5. Choose Recovery Mode menu. Navigate with Volume Up and press Volume Down to OK or Choose it
  6. Wait until Android logo appear, and press Power Button
  7. Choose Wipe data/factory reset menu. Navigate with Volume Down and press Volume Up to Ok or Choose it (different with no.5 for volume button)
  8. Follow the menu at LCD screen to continue the hard reset ACER LIQUID Z520 (DUO)


How to Restore and Reinstall Clean Android Operating system / firmware at ACER LIQUID Z520 (DUO) (Reformat)?

The factory default Android operating system of ACER LIQUID Z520 is Android Kitkat and this OS ready to use. Just open the box, charge the battery until full and turn on this phone. We just need to enter Google account to continue use this phone, although we can skip sign-in to Google account, but it is very recommended to do. The problems may happen when some applications crash or get trouble, it can make our ACER LIQUID Z520 operating system become corrupt or damage, it will act strange. We have to reformat or reinstall with factory default operating system. First we have to know, the clean factory default Android operating system file source already saved safely inside ACER LIQUID Z520 ROM or internal memory. Therefore we do not need to copy or connect to other device. Just follow simple steps to hard reset above, then clean factory default Android operating system will be reinstall automatically.


How to Unlock or Fix or Bypass or Solutions for ACER LIQUID Z520 (DUO) forgot password code or security lock screen pattern or pin (lost password)?

We always advice all Android user to give security protections at ACER LIQUID Z520, because maybe our phone stolen or lost or away from us, then we do not want any unauthorized users see our important data. There are several factory options for security protections, but we recommended to use screen lock pattern because it is more easy to open. The problems happen when we forgot the answer for security protections, how to fix this problems? We can bypass or unlock forgot security screen lock pattern or password pin protections at ACER LIQUID Z520 using Google account. Please turn on our ACER LIQUID Z520, when it ask for answer, try to give several time wrong answer continuously until this phone locked or freeze 30 seconds. At this time we can find Forgot Password / Pattern button, press this button then we can type our Gmail / Google account username and password that we have already signed-in before at our ACER LIQUID Z520. If we can not access Google account, then we have to do hard reset or master format using hardware button combination key.


How to Improve Performance ACER LIQUID Z520 (DUO) to make run more faster?


Now we see the ACER LIQUID Z520 performance, because this phone use Mediatek Quad Core 1.3Ghz, then this phone have good performance for running daily activity applications. If we choose 2 GB RAM, then make ACER LIQUID Z520 can run multitasking applications more to run together. However, we have to know, some applications that we install from Google Play Store will keep run in the background without any notifications. This conditions will make that apps eat ACER LIQUID Z520 RAM and become insufficient, this will make our ACER LIQUID Z520 slowly to response or run any applications. Therefore we have to uninstall some not use applications to give more free RAM. If we want to make our ACER LIQUID Z520 run faster again like new, then please consider doing hard reset or master format.


Is That Any Secret Code for Doing Format ACER LIQUID Z520 (DUO) ?

There is no secret hidden code for ACER LIQUID Z520 (DUO) to make it back to factory default. Do the options above to hard reset it.


How to Improve Battery Life Longer of ACER LIQUID Z520 (DUO) For Solving Battery Drain Faster Problem (Battery Saving / Extent Battery Life)?

Why our ACER LIQUID Z520 battery not ever lasting? Usually this problems happen because of several possibilities. But we should minimize the use of battery like turn off not use connections, GPS, Wifi, Bluetooth, make the brightness as lower as possible.  We have to know the applications which connect to Internet also will drain ACER LIQUID Z520 battery, therefore we have to uninstall some not use applications. Using LCD is the most high battery drain, therefore we have to consider before using too much LCD if we want to do battery saving.


How to Upgrade ACER LIQUID Z520 (DUO) to Android Kitkat or Android Lollipop Official Update? 

The specification of ACER LIQUID Z520 can run Android Lollipop without problems, but unfortunately when the first time this phone release in the market, this phone installed with Android Kitkat operating system. Until we write this information, Acer still not give any news about when they upgrade Android Lollipop OS to ACER LIQUID Z520. Just wait for additional information for this update.

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