I could not up date 8.1

[svraffter]

ZF Model: ZB570TL
RAM: 4G
Firmware/APP Version: WW-14.02.1809.70_20190708
Frequency of Occurrence: 1
Rooted: No
APP Name:

I bought this smartphone end of last year at Chinese shop through aliexpress. android version 7.0 Firm no. WW-14.02.1809.70_20190708 Base band version MOLY.LR11.W1603.MD.MP.V35.4.P119, 2018/09/17 10:38 Kernel version 3.18.35+ wind-kernel@droid #1 Mon Jul 8 15:45:08 CST 2019 Build no. WW-Phone-14.02.1809.70-20190708 I tried to up date android version 8.1 by using manual up date. But I could not it. It indicated failure halfway through. (Version WW-15.02.1810.347 2018/11/14, version WW-15.02.1904.453 2019/05/23) Of course, I chcked system up date several times. But I did not get it. Could you show me how to do it ? [img]https://dlcdnww-zentalk.asus.com/zentalk/static/image/common/loading.gif[/img]

[svraffter]

Selena_ASUS posted on 2020/1/21 09:13 Hi svraffter

I sent my serial no. to you ! Did you get it ?

[alaneroussis]

Same problem here firmware WW-14.02.1809.70_20190708 I will send you my serial number

[patrix]

Last edited by patrix_E537 on 2020/1/31 17:24 Io ho lo stesso problema .... appena arrivato da Bangood ... risolto con la tua recensione... grazie

[quilibrium]

do the downgrade found here (Version Android P downgrade to O ) https://www.asus.com/us/Phone/ZenFone-Max-Plus-M1/HelpDesk_BIOS/ after reboot keep an eye on your phone since it wants to install apps that you might not want and cancel them.

[svraffter]

quilibrium posted on 2020/2/2 18:52 do the downgrade found here (Version Android P downgrade to O ) https://www.asus.com/us/Phone/ZenFon ...

Thank you for your valuable information. But I would like to hear "Asus official opinion". Who made this firm ware WW-14.02.1809.70-20190708 . I think that not each store but Asus China factory. Asus is obliged to solve the problem. Because serial No. are all same "C4ATAS000000" & Google play protect indicated " not authorized". Please check your serial no. Google play protect.