Hi,
Yesterday my nephew wanted to show me a cool trick, getting to the settings menu. Although i had seen that already, i let him..
If only i hadn't, as he clicked on the radioband button with only "US" as a choice, and now i can't receive calls or call out myself.
As i can't risk losing data, i can't reflash, there is just too much i can't backup (Like Google Authenticator, i would have to disable it on 50+ accounts first)
So found the following link /t5/Xperia-Z1-Compact/WARNING-Never-Change-Radio-Band/td-p/905055/page/4, where all you need is ADB and your phone in fastboot / bootloader.. So, i have my Z5 in Developer mode, enabled USB Debugging (Also tried OEM unlocking as well), installed the latest ADB ( I tried both "Minimal ADB and Fastboot" and "platform-tools-latest-windows") and installed the "latest_usb_driver_windows". (After Phone started in fastboot, updated the S1.. Fastboot hardware drivers with the ones downloaded)
All seems OK, devices are found, but after i give the commands i get:
C:\Program Files (x86)\Minimal ADB and Fastboot>adb reboot bootloader
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot erase modemst1
erasing 'modemst1'...
FAILED (command write failed (Unknown error))
finished. total time: 0.002s
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot erase modemst2
erasing 'modemst2'...
FAILED (command write failed (Unknown error))
finished. total time: 0.002s
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot erase cache
erasing 'cache'...
FAILED (command write failed (Unknown error))
finished. total time: 0.001s
All that works is: fastboot reboot..
It looks like the phone doesn't accept the commands, as even when i try a not existing one like "fastboot erase notexistingfolder, i get the same response..
Is it the software on my Xperia Z5, 7.1.1 (32.4.A.1.54)?
Is it my Windows version (W10 Pro x64, 1709)?
Do i need a special/other ADB+driver combo? I already installed the Sony Android .inf (disabled Driver Signing)
I used ADB before, never run in so much problem getting it going.. It doesn't need to have a unlocked bootloader for this, right?
As anything like that defeats the purpose of restoring calls without erasing the device..
Any help is appreciated. Willing to install W7/8 if needed to get it to work or use some sort of bootable W7/disk..
Thanks, allegro16
