U11 baseband unknown

[KaricKKL]

My situation is having a HTC U11 Dual Sim with ViperU 2.3.0 rom for more than a year, suddenly the phone lost all SIM signal and wifi signal.

*#06# does not show any IMEI number, also Settings shows the IMEI is "UNKNOWN".

Download mode and fastboot could able to show the IMEI number normally, so this might not be a hardware problem.

I have try the actions below, but none of them helps
- Restore previous TWRP backup
- Reinstall ViperU rom zip through TWRP
- Do a wipe to restore factory settings
- RUU with bootloader unlock
- RUU with bootloader re-lock

Now I am stuck at the official HTC rom setup page with bootloader re-lock, the setup wizard cannot continue because lack of internet connection (cannot recognize both SIM and unable to search any WIFI).

Could anyone knows solution for the baseband unknown problem.

C:\adb>fastboot getvar all
(bootloader) kernel: lk
(bootloader) product: htc_ocndugl
(bootloader) version: 1.0
(bootloader) max-download-size: 2399200000
(bootloader) serialno: [COLOR="red"]Removed[/COLOR]
(bootloader) slot-count: 0
(bootloader) current-slot:
(bootloader) imei: [COLOR="Red"]Removed[/COLOR]
(bootloader) version-main: 2.42.400.3
(bootloader) boot-mode: download
(bootloader) version-baseband: 8998-002772-1712011153
(bootloader) version-bootloader: 1.0.0.0000
(bootloader) mid: 2PZC30000
(bootloader) cid: HTC__622
all:
finished. total time: 0.026s

 

[izumisano]

Hello, did you manage to fix the baseband, IMEI, and the network connection problem? My HTC U11 just suddenly got the same issue yesterday. I'm with latest stock ROM.
Thanks.

 

[sebjel]

Just got the same problem! Did it work out for one of you guys? Any help is highly appreciated!