[ZenFone 2 Q&A, Help & Troubleshooting] kim7tng:
Zenfone2 ZE550ML Z008 No Sound call &Flash image failure (FAILED (wrong image format)

OK, after some search and trying, i really need more help from xda community, especially asus zenfone 2 ZE550ML user and developer and others too

so, this is whats happen so far:

i got this phone from my sister, asus zenfone 2 ZE550ML Z008 2GB memory with weird problem...

the phone cannot send/receive sound from phone calling.

the call can be made, but not any sound can be heard, in and out...

well, maybe the mic and speaker broken, i found that it is not the case...

why? because any messenger apps (Whatsapp, BBM, IMO, Line) which have voice call, worked just fine, no problem at all

i tried self test (using calulator .12345+= trick) everything working just fine too.

it happen too even when using earphone (which i already tested again worked fine with Whastapp, BBM, Line, IMO, maybe other apps too). the earphone is fine, normal and working OK

i tried doing factory reset, failed, after some search, for anything that can be done, it said disable ok google detection, turn ON dial pad, update asus call screen, etc,

let me know if there is more things to try...

i also already try wipe factory reset and cache from recovery mode, still no luck...

i also find that the SIM2 IMEI is unknown/null, but SIM 1 IMEI still normal...

tried changing to SIM 2, and as expected, it didnt get any signal, so cannot be used

i tried all OTA update to the latest update, and the problem still exist :(

so i think i should flash using Asus Flash Tools (AFT) using flash raw file so it can fix this problem, to make the phone really like new again...

but, another problem arise...

i already prepare all driver and AFT and raw file...

in device manager, everything fine, no any yellow/red mark to any device...

boot to fastboot mode, connect the usb cable, detected in AFT and status is connected with blue circle.

but i cannot flash :( when i click start, after a while, yellow circle, then red circle with note "Flash image failure (FAILED (wrong image format))"

it failed and not flash the phone, the phone can still be used normal like nothing

happen (but still with the problem i mention :p )

OK, maybe, the file i downloaded corrupted, so i download again few times, but it keep showing the same error

"Flash image failure (FAILED (wrong image format))"

i tried download other version, and error still the same :(

i also tried different version of AFT from 1.0.0.14 until the latest one, 1.0.0.55 , and still same error...

i am sure my phone is ZE550ML since in the back of the phone there is written Model : ASUS_Z008, or am i wrong??

after that, i tried flash using ADB and zip file from asus site, with the most older file, which is "UL-Z008-WW-2.12.40.9-user.zip" but cannot be done, it is said cannot flash with older version than the current firmware

so i download the latest firmware "UL-Z008-WW-4.21.40.191-user.zip" which is marsmellow, hoping my problem can be fix

but, the problem still exist...really exactly the same way...really confusing

tried self test again, yup, 100% still the same problem...

so now, i need advice and any info, how to flash using AFT and raw file...??

or how to fix the "Flash image failure (FAILED (wrong image format))" error.

FYI, this phone still not root or unlock bootloader (i suppose, because my sister just use it as it is)

but i notice in fastboot mode, the "BOOTLOADER VERSION - Unknown" is it mean it already unlock or what??

Please help me, any advice, suggestion or info highly appreciated...

thx, and sorry for the poor english writing :p