Tips and tricks when ASUS ZENFONE 3 ULTRA ZU680KL get problems. This is dual simcard GSM-GSM Android smartphone using Android Marshmallow as factory default operating system. The LCD screen is 6.8 inches which is not too much different with 7 inches tablet. That is why we call it as ULTRA with ultra screen size and battery capacity. Find more information about review and solutions when ASUS ZENFONE 3 ULTRA ZU680KL get some problems. Camera is one good thing at ASUS ZENFONE 3 ULTRA ZU680KL because it have 23 megapixel with fast accurate laser autofocus. Dual LED will give more natural color when we use the light flash help. If we are heavy users and need to install many applications, it is better to buy ASUS ZENFONE 3 ULTRA ZU680KL with bigger internal memory capacity, because all installed applications by default will use internal memory for store apps and data.


What is Advantage of ASUS ZENFONE 3 ULTRA ZU680KL Specifications:

GSM Dual Sim On Together (GSM-GSM) / 3G HSDPA and 4G LTE
LCD 6.8 inches
Internal memory 32 GB or 64 GB or 128 GB
RAM 3 GB or 4 GB
External memory microSD Slot maximum 256 GB
Main Camera 23 MP, f/2.0, laser/phase detection autofocus, OIS (4-axis), dual-LED (dual tone) flash
Front Camera 8 MP with f/2.0 for video conference and good selfie photography
Processor Octa-core 1.8 GHz Cortex-A72 & 1.4 GHz Cortex-A53
Operating system Android Marshmallow version 6.0.1
Battery Li-Ion 4600 mAh
Quick Charging



How to backup data or Contact at ASUS ZENFONE 3 ULTRA ZU680KL?

Backup all important data when we have time to do that, because we never know when our ASUS ZENFONE 3 ULTRA ZU680KL will get any trouble. We can use microSD external card to copy or move important files using File Manager applications. If our ASUS ZENFONE 3 ULTRA ZU680KL 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.

ASUS also have backup applications from Google Play Store which is free to download for all Asus users. Find at Google Play Store using keyword ASUS BACKUP, and choose from ZenUI, ASUS Computer Inc developers. Please note, Asus Backup will not backup data file or photos or videos from internal memory, therefore we have to backup manually to microSD using file manager. Asus Backup will backup installed applications and data for that apps. Also for ASUS ZenUI apps, such as ZenUI Launcher, ZenUI Do it Later, ZenUI Contacts and ZenUI Messaging.


#Option 1, Hard Reset ASUS ZENFONE 3 ULTRA ZU680KL with Software Menu :

  1. Make sure the battery is charge properly
  2. Turn on ASUS ZENFONE 3 ULTRA ZU680KL smartphone
  3. Don’t forget 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 ASUS ZENFONE 3 ULTRA ZU680KL
  6. The ASUS ZENFONE 3 ULTRA ZU680KL will continue the step until ready to use in clean factory default.



hard reset asus zenfone 3 ultra zu680kl


#Option 2, Hard Reset ASUS ZENFONE 3 ULTRA ZU680KL 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 3 ULTRA ZU680KL
  4. Press and hold Volume Up button (do not release and continue to no.5)
  5. Press and hold Power button (no.4 still continue press and hold), so now we hold Volume Up Button + Power Button together
  6. Wait until vibrate appear at ASUS ZENFONE 3 ULTRA ZU680KL, then release Power button (do not release Volume Up button)
  7. If we see Logo appear at LCD screen, then release Volume Up button (release all button now)
  8. Wait until FASTBOOT MODE appear
  9. At this text menu, use Volume Down Button to choose Recovery Mode and continue with press Power Button to confirm or OK
  10. Wait until the LCD of ASUS ZENFONE 3 ULTRA ZU680KL will show the Android Logo with error text, continue press and hold POWER button, after that continue press and release one time Volume Up, then we will see Android System Recovery Mode menu
  11. Follow the menu at LCD screen to continue wipe data/factory Reset for hard reset ASUS ZENFONE 3 ULTRA ZU680KL, use Volume Up or Volume Down to navigate the Menu and press Power Button to OK or Enter


Is That Any Secret Code for Doing Format ASUS ZENFONE 3 ULTRA ZU680KL ?

There is no secret hidden code for ASUS ZENFONE 3 ULTRA ZU680KL to make it back to factory default. Do the options above to hard reset it.


How to Format or Erase Phone Memory at ASUS ZENFONE 3 ULTRA ZU680KL ?

There are two phone memory type at ASUS ZENFONE 3 ULTRA ZU680KL, 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 3 ULTRA ZU680KL 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 3 ULTRA ZU680KL Stronger, Life Longer and Not Fast to Drain ?


With 6.8 inches LCD screen, this phablet will need more bigger battery capacity. ASUS ZENFONE 3 ULTRA ZU680KL use 4600 mAh battery, this is enough to make this phablet run more then one day with standard usage. But as we know using tablet size smartphone will make us fun to do some work or watch movie or playing games, then maybe 4600 mAh battery will not enough. We have to do some adjustment to make the battery work more stronger such as set LCD screen brightness as low as possible. There are other steps that we have to disable to reduce battery usage of ASUS ZENFONE 3 ULTRA ZU680KL, by turn off all not use connections like GPS or Wifi or Bluetooth or Infrared. They still consume battery power when active although we are not use that connections.