[X Style (Pure) Q&A, Help & Troubleshooting] oblib__:
That's probably worth a try, downloading stock image right now.

Additional info: all other radios (LTE, Bluetooth) seem to work okay.

Could someone do the following and see if it looks the same as mine?

shell@clark:/ $ su
root@clark:/ # ls -lR /persist/

/persist/:
drwxr-xr-x mot_tcmd mot_tcmd 1969-12-31 17:03 antcap
drwxr-xr-x mot_pwric mot_pwric 1969-12-31 17:03 batt_health
drwxr-xr-x mot_tcmd bluetooth 1969-12-31 17:03 bt
drwxr-sr-x mot_tcmd mot_tcmd 1969-12-31 17:03 camera
drwx------ system system 2015-07-30 12:20 data
drwxrwx--- system graphics 1969-12-31 17:03 display
drwxr-xr-x mot_tcmd mot_tcmd 1969-12-31 17:03 factory
drwx------ root root 1969-12-31 17:00 lost+found
drwxrwx--- radio radio 2015-09-09 20:11 mdm
drwxr-xr-x mot_tcmd mot_tcmd 1969-12-31 17:03 public
drwxrws--- mot_tpapi mot_tpapi 2015-08-24 07:18 security
drwxrwxr-x root root 2015-07-29 11:05 sensors
drwxr-xr-x mot_tcmd mot_tcmd 1969-12-31 17:03 wifi
-rw------- wifi system 7 1969-12-31 17:03 wlan_mac_serial.bin
drwxrwxr-x mot_drm mot_drm 1969-12-31 17:03 wmdrm

/persist//antcap:

/persist//batt_health:

/persist//bt:

/persist//camera:
drwxr-xr-x camera mot_tcmd 1969-12-31 17:01 ledcal

/persist//camera/ledcal:
-rw-rw---- camera camera 77 1969-12-31 17:01 front
-rw-rw---- camera camera 229 1969-12-31 17:01 rear

/persist//data:
drwx------ system system 2015-08-24 07:19 sfs
drwx------ system system 2015-07-30 12:20 tz

/persist//data/sfs:
-rwx------ system system 1336 2015-08-24 07:18 4EZQjbOGb1W-1552WQ33osdXIck_
-rwx------ system system 1336 2015-08-24 07:19 BlnxQBesIFWbwNCK2OMEGP-wOkg_
-rwx------ system system 1336 2015-08-24 07:18 DsmAfAWBFCJVlmQUsgNSwY12M+E_
-rwx------ system system 1336 2015-08-24 07:18 FvF0SaGbFseVknwwKwP2Pknp7KQ_
-rwx------ system system 1336 2015-08-24 07:19 S184ZMCBpOaKXnKHFMVZu2KUkTY_
-rwx------ system system 1336 2015-08-24 07:19 S3TZEnsT9XVFFU2I2lWugTOYodo_
-rwx------ system system 1336 2015-08-24 07:19 bT7VGR2tDnBydb1IJmFjNDdBaU8_
-rwx------ system system 1336 2015-08-24 07:18 guy+4YDd1pve+q2qkHB6MDV1xDQ_
-rwx------ system system 1336 2015-08-24 07:18 iV4mGrgUcC10F1SsXzWV6jTaSQw_
-rwx------ system system 1336 2015-08-24 07:18 nmD18nOVg-hJSoABl8Jk6ugi0Ns_
-rwx------ system system 1336 2015-08-24 07:19 oQUrZKLiEwq4QuUfUhM7PmBq714_
-rwx------ system system 1336 2015-08-24 07:18 ouH--IhHfo3YeuC7fV5HOm64N8o_

/persist//data/tz:
-rwx------ system system 272 2015-08-24 07:19 tz_counter
-rwx------ system system 272 2015-08-24 07:19 tz_counter.bak

/persist//display:

/persist//factory:
-rw-rw---- mot_tcmd mot_tcmd 128 1969-12-31 17:01 fti

/persist//lost+found:

/persist//mdm:
-rw------- radio radio 5 2015-12-18 11:22 oma_dm_update

/persist//public:
drwxrwx--- mot_atvc shell 1969-12-31 17:03 atvc
drwxr-xr-x mot_accy mot_tcmd 1969-12-31 17:03 battd
drwxr-xr-x system mot_tcmd 2015-09-10 09:45 hiddenmenu
drwx------ system system 1969-12-31 17:03 locale
drwx------ radio radio 1969-12-31 17:03 omadm
drwxrwx--- system system 1969-12-31 17:03 svcs

/persist//public/atvc:

/persist//public/battd:

/persist//public/hiddenmenu:
drwxrwxr-x system mot_tcmd 2015-08-24 07:51 data
-rw-rw-r-- system mot_tcmd 4 2015-12-18 11:24 life_calls
-rw-rw-r-- system mot_tcmd 8 2015-12-18 11:24 life_timer

/persist//public/hiddenmenu/data:
-rw-rw-r-- system mot_tcmd 8 2015-12-18 10:23 mobile_data_rx
-rw-rw-r-- system mot_tcmd 8 2015-12-18 10:23 mobile_data_tx
-rw-rw-r-- system mot_tcmd 8 2015-12-18 10:23 wifi_data_rx
-rw-rw-r-- system mot_tcmd 8 2015-12-18 10:23 wifi_data_tx

/persist//public/locale:

/persist//public/omadm:

/persist//public/svcs:

/persist//security:
-rw------- mot_tcmd mot_tpapi 1954 2015-08-24 07:18 18.bin

/persist//sensors:
-rw-rw-r-- system root 2 2015-07-29 11:05 sensors_settings

/persist//wifi:

/persist//wmdrm: