[HTC One Max] xmind2006:
I've got some similar situations with my wifi and data with the exclamation marks and not actually able to connect. Toggling airplane mode fixes it for a time period. Sometimes it is just data and I can toggle wifi and it'll recover. Wifi itself isn't too bad, but the problem gets worse when I turn Bluetooth on. Not only does wifi drop connectivity, but I constantly loose conectivity with Bluetooth. I've never really tested bluetooth on my phone except some phone connections to my car, but haven't used it in a long time. I just got a LG Urbane smarthwatch and I have it setup to notify when the BT connection drops and it drops quite frequently...like 5+ times an hour and is down for quite some time....like 1-2 minutes at a time.

Not sure it is related, but I've had issues with GPS since the day 1 I got this phone...so pretty much every radio in this thing is giving me problems from one form or another.

I was running the May 23rd version of the CM12.1 rom and have since updated to the July 3rd version and no change in radio stability....which I expected since I didn't see anything about radio bug fixes in all the changelogs.

So is there a firmware I'm missing or is my hardware really that borked? See below for my version information

Device Model: HTC6600LVW

CyanogenMod Version: 12.1-20150703-NIGHTLY-t6vzw

Android Version: 5.1.1

Baseband Version: 1.36.60.0122

Kernel Version: 3.4.105-gaf476f8 (build02@cynogenmod #1)

Build number: cm_t6vzw-userdebug 5.1.1 LMY48B 58e896f597 test-keys

SELinux status: Enforcing

PRL version: 15414

TWRP: v2.8.6.0

HBoot: 2.49.0000

I have my "Preferred network type" set to CDMA+LTE/EvDo

let me know if anyone has any ideas. I love the phone, my watch, and ROM, but this is definitely adding a bit of pain to the experience.

Edit: looks like my baseband is a little old. I found this page that list the 1.36.60.0520 version and it does mention fixing some wifi connectivity issues. Does anyone have this version of firmware that I can use to update my device?

www.verizonwireless.com/support/knowledge-base-plain-92212/+&cd=1&hl=en&ct=clnk&gl=us

Edit2: Okay things went from annoying to much worse. I found Flyhalf's thread in the link below that had the new firmware attached. I downloaded and followed the instructions. Everything behaved as indicated in the instructions, but upon a reboot out of fastboot I get an HTC logo, followed by a short black screen, then an outline of a device with a red exclamation mark in a red triangle in which it just sits there. I have rebooted into recovery and it does show the newer baseband. However, I did notice that while the ADB command window said successful the 2nd time, the progress bar on the phone stayed at around 95%. I have tried flashing the older 1.36.60.0122, but with the same end result. I'm s-off and unlocked. Any ideas here?

http://xdaforums.com/showthread.php?t=2768021

Saga Concludes: So maybe it is well known that you have to reflash recovery and system after a firmware update, but I didn't think that was the case....though this experience says otherwise. So to fix my situation I ended up having to do the following:

1. Download the latest TWRP (v2.8.7 in my case) and save it as twrp.img in my ADB.exe folder

2. Boot the phone into fastboot (hold down volume and power from power off state to get to hboot), then select fastboot

3. plug into my computer and type the command "fastboot flash recovery twrp.img"

4. Boot into hboot and select recovery. ****Important, do not issue a reboot command, do not power off the phone, or disconnect from your computer**** For some reason I could not get into recovery after a reboot, so flashing TWRP and immediately going into recovery worked.

5. From TWRP, you have a few options: for me it was to pull off all my files as a backup via Windows since TWRP is able to expose the storage on the phone.

6. I reflashed the latest nightly that was on my internal storage with TWRP and wiped the cache, then finally rebooted and it booted without a hitch this time.