[Droid Turbo 2 Q&A, Help & Troubleshooting] implausibleg:
Hi firmware experts! I have been working on getting a Turbo 2 working after water damage for the last couple of weeks. I am not an expert on any of this, so learning is where most of the time has gone.

After the rice drying, etc, the phone was in bootloop. I tried reflashing firmware, and I finally was able to successfully flash stock 6.0.1, but the phone remained in bootloop. I took the phone apart, removed a bunch of EMI shields, and scrubbed the components with 91% isopropyl, put it back together, and it booted right up. All tested components worked perfectly, ..... that is until I tried to activate the phone on a network. That's when I realized the cellular radio isn't working (wifi and bluetooth radios are intact).

Indications that cellular radio is non-functional:

*after activation attempt, phone call attempts result in the phone telling me to turn airplane mode off when it is off already

*sim card is being read but network signal not showing in notification bar or other such places

*under sim status in the settings the 'Service state' reads "Voice: Radio off / Data: Radio off" with an active sim card in the phone, rather than "Voice: In service..." or "Voice: Out of service..." as a Turbo I used for comparison displays

I'm not ruling out that there could be water induced damage to the cellular circuitry, but it seems strange and unfortunate that that would be the only issue that would remain. I'm wondering if I messed up the modem firmware during flashing.

Here is my most recent flash sequence with 6.0.1 (I believe I downloaded from mirrors.lolinet.com):

fastboot getvar max-sparse-size
fastboot oem fb_mode_set
fastboot flash partition gpt.bin
fastboot flash bootloader bootloader.img
fastboot flash logo logo.bin
fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img_sparsechunk.0
fastboot flash system system.img_sparsechunk.1
fastboot flash system system.img_sparsechunk.2
fastboot flash system system.img_sparsechunk.3
fastboot flash system system.img_sparsechunk.4
fastboot flash system system.img_sparsechunk.5
fastboot flash system system.img_sparsechunk.6
fastboot flash system system.img_sparsechunk.7
fastboot flash system system.img_sparsechunk.8
fastboot flash system system.img_sparsechunk.9
fastboot flash system system.img_sparsechunk.10
fastboot flash system system.img_sparsechunk.11
fastboot flash system system.img_sparsechunk.12
fastboot flash system system.img_sparsechunk.13
fastboot flash system system.img_sparsechunk.14
fastboot flash system system.img_sparsechunk.15
fastboot flash modem NON-HLOS.bin
fastboot flash bluetooth BTFM.bin
fastboot flash fsg fsg.mbn
fastboot erase modemst1
fastboot erase modemst2
fastboot erase cache
fastboot erase userdata
fastboot erase customize
fastboot erase clogo
fastboot flash fsg fsg.mbn
fastboot flash bluetooth BTFM.bin
fastboot oem fb_mode_clear

I didn't have any errors.

Is there a chance that I flashed a firmware from another region (I'm US) and that is the prob? I've tried flashing earlier stock firmwares I can find, ie. 5.1.1 but I get 'preflash validation failed',presumably because by bootloader won't let me downgrade.

XT1585_KINZIE_VERIZON_6.0.1_MCK24.183-22_cid2_subsidy-DEFAULT_CFC.xml

Would it be a good idea to try 'fastboot flash modem NON-HLOS.bin' or fsg by itself? Maybe I could try to just flash the modem and fsg from another package, which I think the bootloader might let me do.

I've read that you want to have a backup of the EFS, but it doesn't seem like you can without root, which I don't think I can do with my locked bootloader? I do still have an IMEI.

I am trying everything I can to get this working, any help is greatly appreciated. If you guys say it's no chance of a software fix then I'll go back into the phone and check the antenna connector and remove the rest of the EMI shields and scrub what's underneath, but I don't want to do this until I am more sure it isn't a software issue because I don't want to take the chance of breaking things in there when it wasn't necessary.

Thanks a ton!