[Sony Xperia XZ Premium Questions & Answers] JoeBlogs911:
Recently switched provider but XZ Premium was performing terribly with new sim. Constant hanging/restarting etc.

I decided to switch to current providers firmware using Flasher by Androxyde and XperiFirm.

Afterwards the handset is far more stable and usable. Wifi Calling is provisioned and working perfectly which is a great bonus. Still getting some issues with UX system hanging.

However it looks like I have lost fingerprint functionality and settings. In logcat I can see the following Error sequence repeating over and over:

01-09 12:51:19.555 26503 26503 D : fpc fingerprint hwbinder service starting
01-09 12:51:19.555 26503 26503 D libfingerprint_core: core_init
01-09 12:51:19.555 26503 26505 D libfingerprint_core: worker_thread: started
01-09 12:51:19.555 26503 26505 D libfingerprint_core: pick_task: suspended 0
01-09 12:51:19.555 26503 26505 D libfingerprint_core: pick_task: No tasks
01-09 12:51:19.555 26503 26505 D libfingerprint_core: worker_thread: Waiting tasks, suspended 0, on pause 0
01-09 12:51:19.556 26503 26503 I fingerprint_display_handler: Registered a screen state sniffer
01-09 12:51:19.558 26503 26503 I fingerprint_key_handler: Input device qpnp_pon (/dev/input/event0) supports KEY_POWER
01-09 12:51:19.559 26503 26503 I fingerprint_key_handler: Input device HDMI CEC User or Deck Control (/dev/input/event1) supports KEY_POWER
01-09 12:51:19.559 26503 26503 D fingerprint-oem-server: install_oem_client_handler: installed ID 2
01-09 12:51:19.559 26503 26503 D fingerprint-oem-server: install_oem_client_handler: installed ID 3
01-09 12:51:19.559 26503 26507 I fingerprint_key_handler: key_thread: starting
01-09 12:51:19.559 26503 26503 I fingerprint_key_handler: Input device qpnp_pon (/dev/input/event0) supports KEY_POWER
01-09 12:51:19.559 26503 26503 I fingerprint_key_handler: Input device HDMI CEC User or Deck Control (/dev/input/event1) supports KEY_POWER
01-09 12:51:19.559 26503 26503 D fingerprint-oem-server: start_oem_server
01-09 12:51:19.559 26503 26508 I fingerprint_key_handler: key_thread: starting
01-09 12:51:19.559 26503 26503 D fingerprint-oem-server: open_socket: pass
01-09 12:51:19.559 26503 26503 D libfingerprint_core: set_env: added key 'hal_dev' value 0x769ea41000
01-09 12:51:19.559 26503 26503 D libfingerprint_core: task_alloc: authenticate
01-09 12:51:19.559 26503 26503 D libfingerprint_core: task_set_suspendable: authenticate
01-09 12:51:19.559 26503 26503 D libfingerprint_core: task_alloc: enroll
01-09 12:51:19.559 26503 26503 D libfingerprint_core: task_alloc: remove
01-09 12:51:19.559 26503 26503 D libfingerprint_core: task_alloc: enumerate
01-09 12:51:19.560 26503 26503 D QSEECOMAPI: QSEECom_get_handle sb_length = 0x80
01-09 12:51:19.560 26503 26503 D QSEECOMAPI: App is not loaded in QSEE
01-09 12:51:19.560 26503 26503 D QSEECOMAPI: app_arch = 1, total_files = 9
01-09 12:51:19.616 26503 26503 D QSEECOMAPI: Loaded image: APP id = 462159875
[B]01-09 12:51:19.619 26503 26503 E fpc_tac : fpc_tac_transfer send_cmd failed -11
01-09 12:51:19.619 26503 26503 E fpc_tac : fpc_tee_print_build_info, fpc_tac_transfer failed -4.
01-09 12:51:19.621 26503 26503 E fpc_tac : fpc_tac_transfer send_cmd failed -11
01-09 12:51:19.621 26503 26503 E fpc_tac : sensor_command, Failed to send command: 4 to TA, status code: -4
01-09 12:51:19.622 26503 26503 E fpc_fingerprint_hal: fpc_hal_open failed[/B]
01-09 12:51:19.622 26503 26503 D QSEECOMAPI: QSEECom_dealloc_memory
01-09 12:51:19.622 26503 26503 D QSEECOMAPI: QSEECom_shutdown_app, app_id = 462159875
01-09 12:51:19.623 26503 26503 D libfingerprint_core: core_release
01-09 12:51:19.623 26503 26505 D libfingerprint_core: worker_thread exit
01-09 12:51:19.624 26503 26503 D libfingerprint_core: purge_messages_locked: 0 messages discarded
01-09 12:51:19.624 26503 26506 D lights-sniffer: thread: Sniffer deactivated
01-09 12:51:19.624 26503 26506 D lights-sniffer: thread: Sniffer thread finished
01-09 12:51:19.626 26503 26509 D fingerprint-oem-server: server_thread: incoming connection
01-09 12:51:19.626 26503 26509 D fingerprint-oem-server: server_thread: waiting for connection info
01-09 12:51:19.626 26503 26509 I fingerprint-oem-server: server_thread: HANGUP
01-09 12:51:19.626 26503 26509 I fingerprint-oem-server: server_thread: exiting

Anybody able to tell me what the -11 and -4 fault code means? Trying to figure out if I missed something during the flash, or is it the image I used etc.

As phone was so unstable before I am not entirely sure if fingerprint was functioning 100% before flashing. Could it be a hardware issue?

The new firmware has same product number (47.2.A.10.107) as previous but R-State reverted from R4C to R1C.

Is there any lower level logs which I can switch on to get more details.

Any help greatly appreciated?