asus ZB551KL can upgarde android 5.1 to 6

[santi_ngam]

I am using asus go tv ZB551KL. Can I upgrade android 5.1 to 6 ?

[Christine_ASUS]

Hi santi_ngam
Thank you for your asking. May you provide me your current firmware version?
Settings>System>About Phone>Software information

# [Newbie Guide] How to update my system (firmware) ? Do I have the latest one?
https://zentalk.asus.com/en/discussion/45648/
# ZB551KL Firmware Download Spot
https://www.asus.com/supportonly/ASUS%20ZenFone%20Go%20(ZB551KL)/HelpDesk_BIOS/

[santi_ngam]

Hi Christine_ASUS
Thank for your help my current firmware
Baseband version : M3.6.17-zB551KL_20631
Kernel version : 3.4.0-g82bca2a
Build number : LMY47V.WW_PHONE-13.0209.1705.117-20170627

[Christine_ASUS]

Hi santi_ngam
Thank you for your reply. WW-13.0209.1705.117 is the last firmware version of ZB551KL.

[santi_ngam]

Hi Christine_ASUS
Thank for your kind. May I ask you another question. I use another phone asus selfie ZD551KL my firmware WW_21.40.0.2214_20171110. Is this lasted firmware? My phone, internal storage is nearly full. Can I format sd card and the internal storage? On my menu settings==> storage&usb==>sd card ==> 3 dot ==> settings has only eject and format as portable storage not as the internal storage as attached file.